D-domain containing polypeptides and uses thereof

ABSTRACT

D domain (DD) containing polypeptides (DDpp) that specifically bind targets of interest (e.g., BCMA, CD123, CS1, HER2, AFP, and AFP p26) are provided, as are nucleic acids encoding the DDpp, vectors containing the nucleic acids and host cells containing the nucleic acids and vectors. DDpp such as DDpp fusion proteins, are also provided as are methods of making and using the DDpp. Such uses include, but are not limited to diagnostic and therapeutic applications.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.16/763,784,371(c) date May 13, 2020, which is a U.S. National Phase ofPCT Application No. PCT/US2018/060887, filed Nov. 14, 2018, which claimsthe benefit of U.S. Provisional Patent Application No. 62/585,780, filedNov. 14, 2017, each of which is incorporated herein by reference in itsentirety.

REFERENCE TO SEQUENCE LISTING SUBMITTED ELECTRONICALLY

The content of the electronically submitted sequence listing (Name:6666_0212_Sequence_Listing-_ST25.txt; Size: 775,173 bytes; and Date ofCreation: Sep. 8, 2021) filed with the application is incorporatedherein by reference in its entirety.

BACKGROUND

Antibody-based reagents have accelerated the pace of biological researchand development. Antibody compositions represent one of the mostimportant and successful classes of therapeutic and diagnostic agentsutilized in the pharmaceutical industry. However, cost, time andefficacy have motivated the development of alternative affinityreagents.

A variety of non-antibody binding formats have emerged for applicationshistorically served by antibodies. While many successes have beenreported for unstructured, linear peptides, more robust results havebeen achieved by imposing a structural constraint on the peptidesequence—typically through the introduction of a disulfide bond. Thisconstraint affords higher affinity and greater specificity through themore favorable thermodynamics of fixed-shape complementarity and surfacepresentations of residues (e.g., hydrophobic amino acids) that mightotherwise be buried and therefore not target-facing (Ladner, Trends inBiotech. 13(10): 426-430 (1995)). Conversely, formats that containdisulfide bonds are typically prone to improper pairing of cysteines,either intra-domain or inter-domain, that can lead to lower expression,product yield and product quality.

Structure found in protein subdomains has provided another source ofstructural constraint. Structures such as fibronectin type III repeats(adnectins), z-proteins (affibodies), knottins, lipocalins (anticalins)and ankyrin repeats (DARPins) have been developed with antibody-likeaffinities against a variety of different targets (Hey et al., Trends inBiotech. 23(10): 514-422 (2005)). These domains typically contain twofeatures that are analogous to the frameworks and complementaritydetermining regions (CDRs) found in antibody variable domains: astructural scaffold that imparts high thermodynamic stability andresidues or loops that form the basis of the display library'svariability.

SUMMARY

There remains a substantial unmet need for new target-bindingcompositions, and particularly for such agents containing alternativebinding scaffolds (e.g., non-antibody scaffolds). Agents of particularinterest may be characterized by, for example, substantially reducedproduction costs and/or comparable or superior reagent, diagnosticand/or therapeutic properties as compared to antibodies. The presentdisclosure provides novel target-binding D domain (DD) polypeptides thatare based on a non-antibody structural scaffold. In some embodiments,the D domain polypeptides (DDpps) are characterized by high targetbinding affinity and by a non-antibody structural scaffold. In someembodiments, the DDpps are target-specific binding polypeptides that canadvantageously be used to target therapeutics (e.g., immune cells) toparticular cells (e.g., diseased cells), thereby reducing or eliminatingoff-target effects. In some embodiments, the provided DDpps are used astherapeutics to bind cells or soluble factors involved in disease.

In some embodiments, the disclosure provides a protein comprising a DDomain (DD) target binding domain (DDpp) wherein the DD specificallybinds a target of interest selected from the group consisting of BCMA(SEQ ID NO: 7), CD123 (SEQ ID NO: 8), CS1 (SEQ ID NO: 965), HER2 (SEQ IDNO: 967), AFP (SEQ ID NO: 9), AFP p26 (SEQ ID NO: 10), or a fragmentthereof. In some embodiments, the DDpp are monovalent or multivalent. Insome embodiments, the DDpp are monospecific or multispecific. In furtherembodiments, the monospecific and multivalent. In other embodiments, theDDpp are multispecific and multivalent. Fusion proteins comprising oneor more DD are also provided, as are methods of making and using thefusion proteins. Nucleic acids encoding the DDpps and vectors and hostcells containing the nucleic acids are also provided. Non-limitingexamples of such uses include, but are not limited to target analysis,and diagnostic and therapeutic applications.

In additional embodiments, the disclosure provides a protein comprisinga D Domain (DD) target binding domain (DDpp) wherein the DD is a memberselected from the group consisting of: (a) a DD that specifically bindsBCMA (SEQ ID NO: 7) and comprises the amino acid sequence of SEQ ID NO:11-305, or 306; (b) a DD that specifically binds CD123 (SEQ ID NO: 8)and comprises the amino acid sequence of SEQ ID NO: 307-739, or 740; (c)a DD that specifically binds AFP (SEQ ID NO: 9) or a fragment thereof,and comprises the amino acid sequence of SEQ ID NO: 741-874, or 886-895;(d) a DD that specifically binds AFP p26 (SEQ ID NO: 10) and comprisesthe amino acid sequence of SEQ ID NO: 741-874, or 886-895. (e) a DD thatspecifically binds CSI (SEQ ID NO: 965) or a fragment thereof, andcomprises the amino acid sequence of SEQ ID NO: 896-909, or 910, and (f)a DD that specifically binds HER2 or a fragment thereof, and comprisesthe amino acid sequence of SEQ ID NO: 911-949, or 950. Proteinscomprising variants of (a)-(f) that retain the ability to specificallybind their respective targets are also provided. In some embodiments,the DDpp is fused to a heterologous polypeptide. In some embodiments,the heterologous polypeptide comprises a full-length antibody or anantibody fragment. In some embodiments, the DD is fused to: the aminoterminus of a full-length antibody heavy chain; the amino terminus of afull-length antibody light chain; the carboxyl terminus of a full-lengthantibody heavy chain; or the carboxyl terminus of a full-length antibodylight chain. In other embodiments, the DD is fused to an antibodyfragment which is an Fc. In additional embodiments, the heterologouspolypeptide comprises a member selected from the group consisting of:(i) a transmembrane domain; (ii) a membrane associating domain; (iii)human serum albumin or a fragment thereof; (iv) AFP or a fragmentthereof; (v) AFP p26 or a fragment thereof; (vi) the extracellulardomain of a receptor or a fragment thereof; and (vii) the extracellulardomain of an intracellular receptor (e.g., a nuclear protein) or afragment thereof. In some embodiments, the protein contains aheterologous polypeptide that comprises the extracellular domain, or afragment of an extracellular domain of BCMA (SEQ ID NO: 7) or CD123 (SEQID NO: 8) or CD19 (SEQ ID NO: 3) or CS1 (SEQ ID NO: 965). In someembodiments, the protein contains a heterologous polypeptide thatcomprises the extracellular domain, or a fragment of an extracellulardomain, of a receptor selected from the group consisting of: CD19, CD20,CD22, HVEM, BTLA, DR3, CD37; TSLPR, IL7R, and gp96. In some embodiments,the protein contains a heterologous polypeptide that comprises anantigenic portion of a serum protein (e.g., AFP, and AFP p26). In someembodiments, the protein contains a heterologous polypeptide thatcomprises an antigenic portion of an intracellular protein (e.g., anuclear protein). In some embodiments, the protein is labeled. Infurther embodiments, the label is selected from the group consisting ofan enzymatic label, a fluorescent label, a luminescent label, abioluminescent label, and a biotin moiety. In additional embodiments,the protein is conjugated to a therapeutic or cytotoxic agent. In someembodiments, the protein contains a heterologous polypeptide that bindsto one or more with major histocompatibility complex (MHC) class I orclass II complexes.

In some embodiments, a DD of the DDpp specifically binds BCMA. In someembodiments, the DD specifically binds a BCMA protein having an aminoacid sequence consisting of SEQ ID NO: 7. In further embodiments, theDDpp comprises an amino acid sequence selected from the group consistingof SEQ ID NO: 11-305, and 306. In other embodiments, the BCMA-bindingDDpp comprises a variant of an amino acid sequence selected from thegroup consisting of SEQ ID NO: 11-305, and 306. In some embodiments, theDDpp comprises multiple target-binding domains (e.g., dimers, trimers,etc.). In some embodiments, the DDpp comprises 2, 3, 4, 5, or more than5, DD that bind BCMA. In some embodiments, the DDpp comprises 2, 3, 4,5, or more than 5, DD that have the same sequence. In some embodiments,the DDpp comprises 2, 3, 4, 5 or more than 5, DD that bind to differentepitopes of BCMA. In some embodiments, the DDpp comprises a DD thatspecifically binds BCMA and further comprises 2, 3, 4, 5 or more than 5,additional different DDs or target-binding binding domains (e.g., scFvs)that bind to BCMA or a different target antigen. In some embodiments,the DDpp comprises a DD that specifically binds BCMA and furthercomprises one or more additional DDs or other target-binding bindingdomains that bind one or more antigens expressed on the surface of a Bcell. In some embodiments, the DDpp comprises a DD that specificallybinds BCMA and further comprises one or more additional DDs or othertarget-binding binding domains that bind one or more cancer antigens. Insome embodiments, the DDpp specifically binds 2, 3, 4, 5, or more than5, different targets. In further embodiments, the DDpp specificallybinds 2, 3, 4, 5, or more than 5, different cancer antigens. In someembodiments, the DDpp specifically binds 2, 3, 4, 5, or more than 5,different cancer antigens expressed on the surface of a cancer cell. Insome embodiments, the DDpp specifically binds 2, 3, 4, 5, or more than5, cancer antigens expressed on the surface of different cancer cells.

In some embodiments, the DDpp is a fusion protein comprising a DD thatspecifically binds BCMA. In some embodiments, the DDpp fusion proteincomprises a DD that specifically binds a BCMA protein having an aminoacid sequence consisting of SEQ ID NO: 7. In some embodiments, the DDppis a fusion protein comprising a DD that comprises an amino acidsequence selected from the group consisting of SEQ ID NO: 11-305, and306. In other embodiments, the BCMA-binding DDpp fusion proteincomprises a variant of an amino acid sequence selected from the groupconsisting of SEQ ID NO: 11-305, and 306. In some embodiments, the DDppfusion protein comprises a full-length antibody or a portion (fragment)of an antibody. In some embodiment, the DDpp fusion protein comprises afull length IgG antibody (e.g., IgG1, IgG2, IgG2, or IgG4). In furtherembodiments, the DDpp comprises a commercially approved therapeuticantibody (e.g., rituximab, ofatumumab, ocrelizumab, veltuzumab,MEDI-551, epratuzumab, belimumab, tabalumab, AMG-557, MEDI-570, andNN882). In other embodiments, the BCMA-binding DDpp is an Fc fusionprotein.

In some embodiments, the DDpp fusion protein comprises a BCMA-binding DDoperably linked to a serum protein. In some embodiments, the DDpp fusionprotein comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 11-305, and 306. In other embodiments, theBCMA-binding DDpp fusion protein comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 11-305, and306. In further embodiments, the DDpp fusion protein comprises humanserum albumin or a fragment thereof. In some embodiments, the DDppfusion protein comprises AFP or AFP p26, or a fragment thereof. In someembodiments, the DDpp fusion protein comprises AFP (e.g., SEQ ID NO: 9),or a fragment thereof. In other embodiments, the DDpp fusion proteincomprises AFP p26 (SEQ ID NO: 10), or a fragment thereof.

In some embodiments, the DDpp fusion protein is a soluble proteincomprising one or more target-binding DDpp and a p29 protein (e.g.,having the sequence of SEQ ID NO: 10, 968, 969, 970, 971, 972, 973, or974). Such fusion proteins containing p29 sequences have been discoveredherein to have surprisingly long serum half-life. In some embodiments,the soluble DDpp fusion protein has a plasma half-life in vivo of atleast 1 hour, at least 2 hours, at least 4 hours, at least 8 hours, atleast 16 hours, at least 32 hours, at least 64 hours, or more. In someembodiments, the soluble fusion protein has an in vivo plasma half-lifeof at least 1 hour, at least 2 hours, at least 4 hours, at least 8hours, at least 16 hours, at least 32 hours, at least 64 hours, or morehours 65 hours, or 1-10 hours, 2-10 hours, 4-10 hours, 6-10 hours, or6-9 hours in a mouse. In some embodiments, the soluble DDpp fusionprotein has an in vivo plasma half-life of at least 1 hour, at least 2hours, at least 4 hours, at least 8 hours, at least 16 hours, at least32 hours, at least 64 hours, or more hours 65 hours, or 1-10 hours, 2-10hours, 4-10 hours, 6-10 hours, or 6-9 hours, in a human.

In some embodiments, the BCMA-binding DDpp fusion protein comprises theextracellular domain of a receptor or a fragment thereof. In someembodiments, the DDpp fusion protein comprises a DD that comprises anamino acid sequence selected from the group consisting of SEQ ID NO:11-305, and 306. In other embodiments, the BCMA-binding DDpp fusionprotein comprises a variant of an amino acid sequence selected from thegroup consisting of SEQ ID NO: 11-305, and 306. In further embodiments,the CD123-binding DDpp fusion protein comprises the extracellular domainof CD123 (SEQ ID NO: 8), or a fragment thereof. In some embodiments, theBCMA-binding DDpp fusion protein comprises the extracellular domain of areceptor selected from the group consisting of: CD19, CD20, CD22, HVEM,BTLA, DR3, CD37, CS1, TSLPR, IL7R, and gp96, or a fragment thereof.

In additional embodiments, the BCMA-binding DDpp fusion proteincomprises an intracellular protein (e.g., a nuclear protein) or afragment thereof. In some embodiments, the DDpp fusion protein comprisesa DD that comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 11-305, and 306. In other embodiments, theBCMA-binding DDpp fusion protein comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 11-305, and306. In some embodiments, the BCMA-binding DDpp fusion protein comprisesa fragment of a serum protein (e.g., HSA, AFP, and AFP p²⁶), anextracellular domain of a receptor (e.g., BCMA, CD123. CS1, and CD19),or an intracellular protein (e.g., a nuclear protein), consisting of5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500, 10-400, 10-300, 10-200,10-100, or 10-50 amino acid residues.

In some embodiments, a DD of the DDpp specifically binds CD123. In someembodiments, the DDpp specifically binds a CD123 protein having an aminoacid sequence consisting of SEQ ID NO: 8. In further embodiments, theDDpp comprises an amino acid sequence selected from the group consistingof SEQ ID NO: 307-739, and 740. In other embodiments, the CD123-bindingDDpp comprises a variant of an amino acid sequence selected from thegroup consisting of SEQ ID NO: 307-739, and 740. In some embodiments,the DDpp comprises multiple target-binding domains (e.g., dimers,trimers, etc.). In some embodiments, the DDpp comprises 2, 3, 4, 5, ormore than 5, DD, that bind CD123. In some embodiments, the DDppcomprises 2, 3, 4, 5, or more than 5, DD, that have the same sequence.In some embodiments, the DDpp comprises 2, 3, 4, 5 or more than 5, DDthat bind to different epitopes of CD123. In some embodiments, the DDppcomprises a DD that specifically binds CD123 and further comprises 2, 3,4, 5 or more than 5, additional different DDs or target-binding bindingdomains (e.g., scFvs) that bind to BCMA or a different target antigen.In some embodiments, the DDpp comprises a DD that specifically bindsCD123 and further comprises one or more additional DDs or othertarget-binding binding domains that bind one or more antigens expressedon the surface of a B cell. In some embodiments, the DDpp comprises a DDthat specifically binds CD123 and further comprises one or moreadditional DDs or other target-binding binding domains that bind one ormore cancer antigens. In some embodiments, the DDpp specifically binds2, 3, 4, 5, or more than 5, different targets. In further embodiments,the DDpp specifically binds 2, 3, 4, 5, or more than 5, different cancerantigens. In some embodiments, the DDpp specifically binds 2, 3, 4, 5,or more than 5, different cancer antigens expressed on the surface of acancer cell. In some embodiments, the DDpp specifically binds 2, 3, 4,5, or more than 5, cancer antigens expressed on the surface of differentcancer cells.

In some embodiments, the DDpp is a fusion protein comprising a DD thatspecifically binds CD123. In some embodiments, the DD specifically bindsa CD123 protein having an amino acid sequence consisting of SEQ ID NO:8. In some embodiments, the DDpp comprises an amino acid sequenceselected from the group consisting of SEQ ID NO: 307-739, and 740. Inother embodiments, the CD123-binding DDpp fusion protein comprises avariant of an amino acid sequence selected from the group consisting ofSEQ ID NO: 307-739, and 740. In some embodiments, the DDpp fusionprotein comprises a full-length antibody or a portion (fragment) of anantibody. In some embodiments, the DDpp fusion protein comprises a fulllength IgG antibody (e.g., IgG1, IgG2, IgG2, or IgG4). In furtherembodiments, the DDpp comprises a commercially approved therapeuticantibody (e.g., rituximab, ofatumumab, ocrelizumab, veltuzumab,MEDI-551, epratuzumab, belimumab, tabalumab, AMG-557, MEDI-570, andNN8828. In other embodiments, the CD123-binding DDpp is an Fc fusionprotein.

In some embodiments, the DDpp fusion protein comprises a CD123-bindingDD operably linked to a serum protein. In some embodiments, the DDppfusion protein comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 307-739, and 740. In other embodiments, theCD123-binding DDpp fusion protein comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 307-739, and740. In further embodiments, the DDpp fusion protein comprises humanserum albumin or a fragment thereof. In some embodiments, the DDppfusion protein comprises AFP or AFP p26, or a fragment thereof. In someembodiments, the DDpp fusion protein comprises AFP (e.g., SEQ ID NO: 9),or a fragment thereof. In other embodiments, the DDpp fusion proteincomprises AFP p26 (SEQ ID NO: 10), or a fragment thereof.

In some embodiments, the CD123-binding DDpp fusion protein comprises theextracellular domain of a receptor or a fragment thereof. In someembodiments, the CD123-binding DDpp fusion protein comprises an aminoacid sequence selected from the group consisting of SEQ ID NO: 307-739,and 740. In other embodiments, the CD123-binding DDpp fusion proteincomprises a variant of an amino acid sequence selected from the groupconsisting of SEQ ID NO: 307-739, and 740. In further embodiments, theCD123-binding DDpp fusion protein comprises the extracellular domain ofBCMA (SEQ ID NO: 7) or CD123 (SEQ ID NO: 8), or a fragment thereof. Infurther embodiments, the CD123-binding DDpp fusion protein comprises theextracellular domain of BCMA (SEQ ID NO: 7), or CD123 (SEQ ID NO: 8), orCS1 (SEQ ID NO: 965), or a fragment thereof. In some embodiments, theCD123-binding DDpp fusion protein comprises the extracellular domain ofa receptor selected from the group consisting of: CD19, CD20, CD22,HVEM, BTLA, DR3, CD37, CS1, TSLPR, IL7R, and gp96, or a fragmentthereof.

In additional embodiments, the CD123-binding DDpp fusion proteincomprises an intracellular protein (e.g., a nuclear protein) or afragment thereof. In some embodiments, the CD123-binding DDpp fusionprotein comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 307-739, and 740. In other embodiments, theCD123-binding DDpp fusion protein comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 307-739, and740.

In some embodiments, the CD123-binding DDpp fusion protein comprises afragment of a serum protein (e.g., HSA, AFP, and AFP 26), anextracellular domain of a receptor (e.g., BCMA, CSI, CD123, and CD19),or an intracellular protein (e.g., a nuclear protein), consisting of5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500, 10-400, 10-300, 10-200,10-100, or 10-50 amino acid residues.

In some embodiments, a DD of the DDpp specifically binds CS1. In someembodiments, the DDpp specifically binds a CS1 protein having an aminoacid sequence consisting of SEQ ID NO: 965. In further embodiments, theDDpp comprises an amino acid sequence selected from the group consistingof SEQ ID NO: 896-909, and 910. In other embodiments, the CS1-bindingDDpp comprises a variant of an amino acid sequence selected from thegroup consisting of SEQ ID NO: 896-909, and 910. In some embodiments,the DDpp comprises multiple target-binding domains (e.g., dimers,trimers, etc.). In some embodiments, the DDpp comprises 2, 3, 4, 5, ormore than 5, DD, that bind CS1. In some embodiments, the DDpp comprises2, 3, 4, 5, or more than 5, DD, that have the same sequence. In someembodiments, the DDpp comprises 2, 3, 4, 5 or more than 5, DD that bindto different epitopes of CS1. In some embodiments, the DDpp comprises aDD that specifically binds CS1 and further comprises 2, 3, 4, 5 or morethan 5, additional different DDs or target-binding binding domains(e.g., scFvs) that bind to BCMA or a different target antigen. In someembodiments, the DDpp comprises a DD that specifically binds CS1 andfurther comprises one or more additional DDs or other target-bindingbinding domains that bind one or more antigens expressed on the surfaceof a B cell. In some embodiments, the DDpp comprises a DD thatspecifically binds CS1 and further comprises one or more additional DDsor other target-binding binding domains that bind one or more cancerantigens. In some embodiments, the DDpp specifically binds 2, 3, 4, 5,or more than 5, different targets. In further embodiments, the DDppspecifically binds 2, 3, 4, 5, or more than 5, different cancerantigens. In some embodiments, the DDpp specifically binds 2, 3, 4, 5,or more than 5, different cancer antigens expressed on the surface of acancer cell. In some embodiments, the DDpp specifically binds 2, 3, 4,5, or more than 5, cancer antigens expressed on the surface of differentcancer cells.

In some embodiments, the DDpp is a fusion protein comprising a DD thatspecifically binds CS1. In some embodiments, the DD specifically binds aCS1 protein having an amino acid sequence consisting of SEQ ID NO: 965.In some embodiments, the DDpp comprises an amino acid sequence selectedfrom the group consisting of SEQ ID NO: 896-909, and 910. In otherembodiments, the CS1-binding DDpp fusion protein comprises a variant ofan amino acid sequence selected from the group consisting of SEQ ID NO:896-909, and 910. In some embodiments, the DDpp fusion protein comprisesa full-length antibody or a portion (fragment) of an antibody. In someembodiments, the DDpp fusion protein comprises a full length IgGantibody (e.g., IgG1, IgG2, IgG2, or IgG4). In further embodiments, theDDpp comprises a commercially approved therapeutic antibody (e.g.,rituximab, ofatumumab, ocrelizumab, veltuzumab, MEDI-551, epratuzumab,belimumab, tabalumab, AMG-557, MEDI-570, and NN8828. In otherembodiments, the CS1-binding DDpp is an Fc fusion protein.

In some embodiments, the DDpp fusion protein comprises a CS1-binding DDoperably linked to a serum protein. In some embodiments, the DDpp fusionprotein comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 896-909, and 910. In other embodiments, theCS1-binding DDpp fusion protein comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 896-909, and910. In further embodiments, the DDpp fusion protein comprises humanserum albumin or a fragment thereof. In some embodiments, the DDppfusion protein comprises AFP or AFP p26, or a fragment thereof. In someembodiments, the DDpp fusion protein comprises AFP (e.g., SEQ ID NO: 9),or a fragment thereof. In other embodiments, the DDpp fusion proteincomprises AFP p26 (SEQ ID NO: 10), or a fragment thereof.

In some embodiments, the CS1-binding DDpp fusion protein comprises theextracellular domain of a receptor or a fragment thereof. In someembodiments, the CS1-binding DDpp fusion protein comprises an amino acidsequence selected from the group consisting of SEQ ID NO: 896-909, and910. In other embodiments, the CS1-binding DDpp fusion protein comprisesa variant of an amino acid sequence selected from the group consistingof SEQ ID NO: 896-909, and 910. In further embodiments, the CS1-bindingDDpp fusion protein comprises the extracellular domain of BCMA (SEQ IDNO: 7), CD123 (SEQ ID NO: 8), or CS1 (SEQ ID NO: 965), or a fragmentthereof. In some embodiments, the CS1-binding DDpp fusion proteincomprises the extracellular domain of a receptor selected from the groupconsisting of: CD19, CD20, CD22, HVEM, BTLA, DR3, CD37, CS-1, TSLPR,IL7R, and gp96, or a fragment thereof.

In additional embodiments, the CS1-binding DDpp fusion protein comprisesan intracellular protein (e.g., a nuclear protein) or a fragmentthereof. In some embodiments, the CS1-binding DDpp fusion proteincomprises an amino acid sequence selected from the group consisting ofSEQ ID NO: 896-909, and 910. In other embodiments, the CS1-binding DDppfusion protein comprises a variant of an amino acid sequence selectedfrom the group consisting of SEQ ID NO: 896-909, and 910.

In some embodiments, the CS1-binding DDpp fusion protein comprises afragment of a serum protein (e.g., HSA, AFP, and AFP 26), anextracellular domain of a receptor (e.g., BCMA, CS1, CD123, and CD19),or an intracellular protein (e.g., a nuclear protein), consisting of5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500, 10-400, 10-300, 10-200,10-100, or 10-50 amino acid residues.

In some embodiments, a DD of the DDpp specifically binds AFP or afragment thereof. In some embodiments, the DDpp specifically binds anAFP protein having an amino acid sequence consisting of SEQ ID NO: 9 ora fragment thereof. In further embodiments, the DDpp comprises an aminoacid sequence selected from the group consisting of SEQ ID NO: 741-874,and 886-895. In other embodiments, the DDpp comprises a variant of anamino acid sequence selected from the group consisting of SEQ ID NO:741-874, and 886-895. In some embodiments, the DDpp comprises multipletarget-binding domains (e.g., dimers, trimers, etc.). In someembodiments, the DDpp comprises 2, 3, 4, 5, or more than 5, DD, thatbind AFP or a fragment thereof. In some embodiments, the DDpp comprises2, 3, 4, 5, or more than 5, DD, that have the same sequence. In someembodiments, the DDpp comprises 2, 3, 4, 5 or more than 5, DD that bindto different epitopes of AFP or a fragment thereof. In some embodiments,the DDpp comprises a DD that specifically binds AFP or a fragmentthereof and further comprises 2, 3, 4, 5 or more than 5, additionaldifferent DDs or target-binding binding domains (e.g., scFvs) that bindto AFP, an AFP fragment, or a different target antigen. In someembodiments, the DDpp comprises a DD that specifically binds AFP or afragment thereof and further comprises one or more additional DDs orother target-binding binding domains that bind one or more antigensexpressed on the surface of a B cell. In some embodiments, the DDppcomprises a DD that specifically binds AFP and further comprises one ormore additional DDs or other target-binding binding domains that bindone or more cancer antigens. In some embodiments, the DDpp specificallybinds 2, 3, 4, 5, or more than 5, different targets. In furtherembodiments, the DDpp specifically binds 2, 3, 4, 5, or more than 5,different cancer antigens. In some embodiments, the DDpp specificallybinds 2, 3, 4, 5, or more than 5, different cancer antigens expressed onthe surface of a cancer cell. In some embodiments, the DDpp specificallybinds 2, 3, 4, 5, or more than 5, cancer antigens expressed on thesurface of different cancer cells.

In some embodiments, the DDpp is a fusion protein comprising a DD thatspecifically binds AFP, or a fragment thereof. In some embodiments, theDD specifically binds an AFP protein having an amino acid sequenceconsisting of SEQ ID NO: 9, or a fragment thereof. In furtherembodiments, the DDpp comprises an amino acid sequence selected from thegroup consisting of SEQ ID NO: 741-874, and 886-895. In otherembodiments, the AFP-binding DDpp comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 741-874, and886-895. In some embodiments, the fusion protein comprises anAFP-binding DD operably linked to a full-length antibody or a portion(fragment) of an antibody. In some embodiments, the DDpp fusion proteincomprises a full length IgG antibody (e.g., IgGI, IgG2, IgG2, or IgG4).In further embodiments, the DDpp comprises a commercially approvedtherapeutic antibody (e.g., rituximab, ofatumumab, ocrelizumab,veltuzumab, MEDI-551, epratuzumab, belimumab, tabalumab, AMG-557,MEDI-570, and NN882. In some embodiments, the AFP-binding DDpp is an Fcfusion protein.

In some embodiments, the DDpp fusion protein comprises a DD thatspecifically binds AFP or an AFP fragment, operably linked to a serumprotein. In some embodiments, the DDpp fusion protein comprises an aminoacid sequence selected from the group consisting of SEQ ID NO: 741-874,and 886-895. In other embodiments, the AFP-binding DDpp comprises avariant of an amino acid sequence selected from the group consisting ofSEQ ID NO: 741-874, and 886-895. In further embodiments, the DDpp fusionprotein comprises human serum albumin or a fragment thereof.

In some embodiments, the DDpp fusion protein comprises a DD thatspecifically binds AFP or an AFP fragment and further comprises theextracellular domain of a receptor or a fragment thereof. In someembodiments, the DDpp fusion protein comprises an amino acid sequenceselected from the group consisting of SEQ ID NO: 741-874, and 886-895.In other embodiments, the AFP-binding DDpp comprises a variant of anamino acid sequence selected from the group consisting of SEQ ID NO:741-874, and 886-895. In some embodiments, the DDpp fusion proteincomprises the extracellular domain of BCMA (SEQ ID NO: 7) or CD123 (SEQID NO: 8), or a fragment thereof. In some embodiments, the DDpp fusionprotein comprises the extracellular domain of BCMA (SEQ ID NO: 7), orCD123 (SEQ ID NO: 8), or CS1 (SEQ ID NO: 965), or a fragment thereof. Insome embodiments, the DDpp fusion protein comprises the extracellulardomain of a receptor selected from the group consisting of: CD19, CD20,CD22, HVEM, BTLA, DR3, CD37; TSLPR, IL7R, and gp96, or a fragmentthereof.

In additional embodiments, the DDpp fusion protein comprises a DD thatspecifically binds AFP or an AFP fragment and further comprises anintracellular protein (e.g., a nuclear protein) or a fragment thereof.In some embodiments, the DDpp fusion protein comprises an amino acidsequence selected from the group consisting of SEQ ID NO: 741-874, and886-895. In other embodiments, the AFP-binding DDpp comprises a variantof an amino acid sequence selected from the group consisting of SEQ IDNO: 741-874, and 886-895.

In some embodiments, the AFP-binding DDpp fusion protein comprises afragment of a serum protein (e.g., HSA), an extracellular domain of areceptor (e.g., BCMA, CS1, CD123, and CD19), or an intracellular protein(e.g., a nuclear protein), consisting of 5-500, 5-400, 5-300, 5-200,5-100, 5-50, 10-500, 10-400, 10-300, 10-200, 10-100, or 10-50 amino acidresidues.

In some embodiments, a DD of the DDpp specifically binds AFP p26. Insome embodiments, the DDpp specifically binds AFP p26 having an aminoacid sequence consisting of SEQ ID NO: 10, or a fragment thereof. Insome embodiments, the DDpp comprises an amino acid sequence selectedfrom the group consisting of SEQ ID NO: 741-874, and 886-895. In furtherembodiments, the DDpp comprises a variant of an amino acid sequenceselected from the group consisting of SEQ ID NO: 741-874, and 886-895.In further embodiments, the DD specifically binds AFP p26 having anamino acid sequence consisting of SEQ ID NO: 10, but does notspecifically bind AFP having an amino acid sequence consisting of SEQ IDNO: 9. In some embodiments, the DDpp comprises multiple target-bindingdomains (e.g., dimers, trimers, etc.). In some embodiments, the DDppcomprises 2, 3, 4, 5, or more than 5, DD, that bind AFP p26. In someembodiments, the DDpp comprises 2, 3, 4, 5, or more than 5, DD, thathave the same sequence. In some embodiments, the DDpp comprises 2, 3, 4,5 or more than 5, DD that bind to different epitopes of AFP p26. In someembodiments, the DDpp comprises a DD that specifically binds AFP p26 andfurther comprises 2, 3, 4, 5 or more than 5, additional different DDs ortarget-binding binding domains (e.g., scFvs) that bind to AFP p26 or adifferent target antigen. In some embodiments, the DDpp comprises a DDthat specifically binds AFP p26 and further comprises one or moreadditional DDs or other target-binding binding domains that bind one ormore antigens expressed on the surface of a B cell. In some embodiments,the DDpp comprises a DD that specifically binds AFP p26 and furthercomprises one or more additional DDs or other target-binding bindingdomains that bind one or more cancer antigens. In some embodiments, theDDpp specifically binds 2, 3, 4, 5, or more than 5, different targets.In further embodiments, the DDpp specifically binds 2, 3, 4, 5, or morethan 5, different cancer antigens. In some embodiments, the DDppspecifically binds 2, 3, 4, 5, or more than 5, different cancer antigensexpressed on the surface of a cancer cell. In some embodiments, the DDppspecifically binds 2, 3, 4, 5, or more than 5, cancer antigens expressedon the surface of different cancer cells.

In some embodiments, the DDpp is a fusion protein comprising a DD thatspecifically binds AFP p26. In some embodiments, the DD specificallybinds AFP p26 having an amino acid sequence consisting of SEQ ID NO: 10.In some embodiments, the DDpp fusion protein comprises an amino acidsequence selected from the group consisting of SEQ ID NO: 741-874, and886-895. In other embodiments, the AFP p26-binding DDpp fusion proteincomprises an amino acid sequence selected from the group consisting ofSEQ ID NO: 741-874, and 886-895. In some embodiments, a DD of the DDppfusion protein specifically binds AFP p26 but does not specifically bindAFP having an amino acid sequence consisting of SEQ ID NO: 9. In furtherembodiments, the DDpp is a fusion protein comprising an amino acidsequence selected from the group consisting of SEQ ID NO: 741-874, and886-895. In other embodiments, the DDpp comprises a variant of an aminoacid sequence selected from the group consisting of SEQ ID NO: 741-874,and 886-895. In other embodiments, the AFP p26-binding DDpp is an Fcfusion protein.

In some embodiments, the DDpp fusion protein comprises a DD thatspecifically binds AFP p26. In other embodiments, the DDpp fusionprotein comprises an AFP p26-binding DD operably linked to a serumprotein. In some embodiments, the DDpp fusion protein comprises an aminoacid sequence selected from the group consisting of SEQ ID NO: 741-874,and 886-895. In other embodiments, the AFP p26-binding DDpp fusionprotein comprises a variant of an amino acid sequence selected from thegroup consisting of SEQ ID NO: 741-874, and 886-895. In furtherembodiments, the DDpp fusion protein comprises human serum albumin or afragment thereof.

In some embodiments, the DDpp fusion protein comprises an AFPp26-binding DD and further comprises the extracellular domain of areceptor or a fragment thereof. In some embodiments, the DDpp fusionprotein comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 741-874, and 886-895. In other embodiments, theAFP p26-binding DDpp fusion protein comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 741-874, and886-895. In some embodiments, the DDpp fusion protein comprises theextracellular domain of BCMA (SEQ ID NO: 7) or CD123 (SEQ ID NO: 8), ora fragment thereof. In some embodiments, the DDpp fusion proteincomprises the extracellular domain of BCMA (SEQ ID NO: 7), CD123 (SEQ IDNO: 8), or CS1 (SEQ ID NO: 965), or a fragment thereof. In someembodiments, the DDpp fusion protein comprises the extracellular domainof a receptor selected from the group consisting of: CD19, CD20, CD22,HVEM, BTLA, DR3, CD37; TSLPR, IL7R, and gp96, or a fragment thereof.

In additional embodiments, the DDpp fusion protein comprises an AFPp26-binding DD and further comprises an intracellular protein (e.g., anuclear protein) or a fragment thereof. In some embodiments, the DDppfusion protein comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 741-874, and 886-895. In other embodiments, theAFP p26-binding DDpp fusion protein comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 741-874, and886-895. In some embodiments, the AFP p26-binding DDpp fusion proteincomprises a fragment of a serum protein (e.g., HSA), an extracellulardomain of a receptor (e.g., BCMA. CS1, CD123, and CD19), or anintracellular protein (e.g., a nuclear protein), consisting of 5-500,5-400, 5-300, 5-200, 5-100, 5-50, 10-500, 10-400, 10-300, 10-200,10-100, or 10-50 amino acid residues.

In some embodiments, a DD of the DDpp specifically binds HER2. In someembodiments, the DDpp specifically binds a HER2 protein having an aminoacid sequence consisting of SEQ ID NO: 967. In further embodiments, theDDpp comprises an amino acid sequence selected from the group consistingof SEQ ID NO: 911-949, and 950. In other embodiments, the HER2-bindingDDpp comprises a variant of an amino acid sequence selected from thegroup consisting of SEQ ID NO: 911-949, and 950. In some embodiments,the DDpp comprises multiple target-binding domains (e.g., dimers,trimers, etc.). In some embodiments, the DDpp comprises 2, 3, 4, 5, ormore than 5, DD, that bind HER2. In some embodiments, the DDpp comprises2, 3, 4, 5, or more than 5, DD, that have the same sequence. In someembodiments, the DDpp comprises 2, 3, 4, 5 or more than 5, DD that bindto different epitopes of HER2. In some embodiments, the DDpp comprises aDD that specifically binds HER2 and further comprises 2, 3, 4, 5 or morethan 5, additional different DDs or target-binding binding domains(e.g., scFvs) that bind to BCMA or a different target antigen. In someembodiments, the DDpp comprises a DD that specifically binds HER2 andfurther comprises one or more additional DDs or other target-bindingbinding domains that bind one or more antigens expressed on the surfaceof a cancer cell. In some embodiments, the DDpp comprises a DD thatspecifically binds HER2 and further comprises one or more additional DDsor other target-binding binding domains that bind one or more cancerantigens. In some embodiments, the DDpp specifically binds 2, 3, 4, 5,or more than 5, different targets. In further embodiments, the DDppspecifically binds 2, 3, 4, 5, or more than 5, different cancerantigens. In some embodiments, the DDpp specifically binds 2, 3, 4, 5,or more than 5, different cancer antigens expressed on the surface of acancer cell. In some embodiments, the DDpp specifically binds 2, 3, 4,5, or more than 5, cancer antigens expressed on the surface of differentcancer cells.

In some embodiments, the DDpp is a fusion protein comprising a DD thatspecifically binds HER2. In some embodiments, the DD specifically bindsa HER2 protein having an amino acid sequence consisting of SEQ ID NO:967. In some embodiments, the DDpp comprises an amino acid sequenceselected from the group consisting of SEQ ID NO: 911-949, and 950. Inother embodiments, the HER2-binding DDpp fusion protein comprises avariant of an amino acid sequence selected from the group consisting ofSEQ ID NO: 911-949, and 950. In some embodiments, the DDpp fusionprotein comprises a full-length antibody or a portion (fragment) of anantibody. In some embodiments, the DDpp fusion protein comprises a fulllength IgG antibody (e.g., IgGI, IgG2, IgG2, or IgG4). In furtherembodiments, the DDpp comprises a commercially approved therapeuticantibody. In other embodiments, the HER2-binding DDpp is an Fc fusionprotein.

In some embodiments, the DDpp fusion protein comprises a HER2-binding DDoperably linked to a serum protein. In some embodiments, the DDpp fusionprotein comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 911-949, and 950. In other embodiments, theHER2-binding DDpp fusion protein comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 911-949, and950. In further embodiments, the DDpp fusion protein comprises humanserum albumin or a fragment thereof. In some embodiments, the DDppfusion protein comprises AFP or AFP p26, or a fragment thereof. In someembodiments, the DDpp fusion protein comprises AFP (e.g., SEQ ID NO: 9),or a fragment thereof. In other embodiments, the DDpp fusion proteincomprises AFP p26 (SEQ ID NO: 10), or a fragment thereof.

In some embodiments, the HER2-binding DDpp fusion protein comprises theextracellular domain of a receptor or a fragment thereof. In someembodiments, the HER2-binding DDpp fusion protein comprises an aminoacid sequence selected from the group consisting of SEQ ID NO: 911-949,and 950. In other embodiments, the HER2-binding DDpp fusion proteincomprises a variant of an amino acid sequence selected from the groupconsisting of SEQ ID NO: 911-949, and 950. In further embodiments, theHER2-binding DDpp fusion protein comprises the extracellular domain ofBCMA (SEQ ID NO: 7), CD123 (SEQ ID NO: 8), or CS1 (SEQ ID NO: 965), or afragment thereof. In some embodiments, the HER2-binding DDpp fusionprotein comprises the extracellular domain of a receptor selected fromthe group consisting of: CD19, CD20, CD22, HVEM, BTLA, DR3, CD37, CS-1,TSLPR, IL7R, and gp96, or a fragment thereof.

In additional embodiments, the HER2-binding DDpp fusion proteincomprises an intracellular protein (e.g., a nuclear protein) or afragment thereof. In some embodiments, the HER2-binding DDpp fusionprotein comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 911-949, and 950. In other embodiments, theHER2-binding DDpp fusion protein comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 911-949, and950.

In some embodiments, the HER2-binding DDpp fusion protein comprises afragment of a serum protein (e.g., HSA, AFP, and AFP 26), anextracellular domain of a receptor (e.g., BCMA, CS1, CD123, and CD19),or an intracellular protein (e.g., a nuclear protein), consisting of5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500, 10-400, 10-300, 10-200,10-100, or 10-50 amino acid residues.

In some embodiments, the DDpp fusion protein comprises a full lengthantibody. In further embodiments, the DDpp is a fusion proteincomprising a full length antibody that specifically binds a cancerantigen. In further embodiments, the DDpp is a fusion protein comprisinga full length antibody, wherein the antibody specifically binds a cancerantigen believed to be expressed by the cancer of the subject to whichthe DDpp fusion protein is administered.

In some embodiments, the disclosed DDpp (e.g., a DDpp fusion protein) islabeled. Labels that can be used to label the DDpp include but are notlimited to an enzymatic label, a fluorescent label, a luminescent label,and a bioluminescent label. In some embodiments, the label is a biotinmoiety. In some embodiments, the label is a streptavidin moiety. In someembodiments, the label is a His-tag or a FLAG tag. In some embodiments,the label is luciferase, green fluorescent protein, red fluorescentprotein, or other similar agent.

In other embodiments, the DDpp fusion protein is attached to a solidsupport. In some embodiments, the solid support is selected from thegroup consisting of: a bead, a glass slide, a chip, a gelatin, and anagarose.

In some embodiments, the DDpp (e.g., a DDpp fusion protein) isassociated with a liposome. In some embodiments, the DDpp is associatedwith the liposome through covalent binding. In some embodiments, DDpp isa fusion protein. In further embodiments, the DDpp is a CAR. Inadditional embodiments, the DDpp is associated with the liposome throughionic binding but not covalent binding.

In some embodiments, the target-binding DDpp is conjugated to atherapeutic or cytotoxic agent (e.g., a chemotherapeutic agent or aradiotherapeutic agent).

In additional embodiments, the disclosure provides a chimeric antigenreceptor 1 CAR) which comprises a target binding domain comprising a DDdisclosed herein (e.g., a DD comprising the amino acid sequence of SEQID NO: 11-949, or 950). In some embodiments, the DD binds BCMA andcomprises an amino acid sequence selected from the group consisting ofSEQ ID NO: 11-305, and 306. In some embodiments, the DD binds CD123 andcomprises an amino acid sequence selected from the group consisting ofSEQ ID NO: 307-739, and 740. In some embodiments, the DD binds AFP andcomprises an amino acid sequence selected from the group consisting ofSEQ ID NO: 741-874, and 886-895. In some embodiments, the DD binds AFPp26 and comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 741-874, and 886-895. In some embodiments, theCAR comprises, a target binding domain, a transmembrane domain, and anintracellular signaling domain. In some embodiments, the CARtransmembrane domain comprises a 41BB or CD28 transmembrane domain. Insome embodiments the CAR comprises an intracellular signaling domainselected from the group consisting of a domain of a human T cellreceptor alpha, beta, or zeta chain; a human 41BB domain; a human CD28domain; and any combination thereof. In some embodiments, the CARintracellular signaling domain comprises the intracellular domain of acostimulatory molecule selected from the group consisting of CD27. CD28,41BB, OX40, CD30, CD40, PD1, lymphocyte function-associated antigen-1(LFA-1). CD2, CD7, LIGHT, NKG2C, B7-H3, a ligand that specifically bindswith CD83, and any combination thereof. In some embodiments the CARfurther comprises a second target binding domain having the same or adifferent target than the DD target binding domain. In some embodiments,the CAR is expressed in an immune cell. In some embodiments, the immunecell is a T cell (CAR-T cell) or a natural killer (NK) cell (CAR-NKcell). In some embodiments, the CAR is associated with a liposome.

In some embodiments, the CAR comprises 2, 3, 4, 5, or more than 5, DDand/or other binding domains (e.g., scFv) that specifically bind atarget of interest (e.g., BCMA or CD123) expressed on the surface of thecancer cell. In additional embodiments, the CAR comprises 2, 3, 4, 5, ormore than 5, DD or other binding domains (e.g., scFv) that specificallybind a second, different target of interest, expressed on the surface ofthe cancer cell. In additional embodiments, the administered CAR furthercomprises 2, 3, 4, 5, or more than 5, DD or other binding domains (e.g.,scFv) that specifically binds a second, different target of interest,expressed by a second, different cancer cell or a vascular endothelialcell.

Nucleic acids encoding the disclosed DDpp (e.g., DDpp fusion proteins)are also provided. Additionally provided are vectors (e.g., plasmids,viral vectors, and non-viral vectors) containing nucleic acids encodingthe DDpp (e.g., DDpp fusion proteins) and host cells containing thenucleic acids and vectors. In some embodiments, the vector comprises anucleotide sequence which regulates the expression of the polypeptideencoded by the nucleic acid molecule. In further embodiments, the vectorcomprises an inducible promoter sequence. In additional embodiments, thevector includes one or more additional standard components forexpression of a protein encoded a nucleic acid (e.g., promoters,packaging components, etc.). In some embodiments, the vector is alentiviral vector.

The disclosure also provides host cells that comprise the nucleic acidmolecules encoding a target-binding DDpp disclosed herein. In someembodiments, the host cells (e.g., cells of a cell line) are engineeredto express a protein containing a DD disclosed herein (e.g., a DD havingthe amino acid sequence of SEQ ID NO: 11-949, or 950). In someembodiments, the expression of the DDpp by the host cells allowsproduction and isolation of the DDpp. In some embodiments, theexpression results in the DDpp being expressed on the surface and/orintegral to the membrane of the host cells. In some embodiments, thehost cell is a viral particle, or a bacterial, yeast, fungal, or plantcell. In other embodiments, the host cell is a mammalian cell. In afurther embodiment, the mammalian cell is an immune cell. In oneembodiment, the host cell is a human immune cell. In some embodiments,the human immune cell is a T cell. In other embodiments, the humanimmune cell is a natural killer (NK) cell. In some embodiments, thehuman immune cell displays the DDpp on its cell surface.

The disclosure further provides a host cell expressing a proteincomprising a DD disclosed herein. In some embodiments, the host cellexpresses a chimeric antigen receptor (CAR) comprising a DD disclosedherein. In some embodiments, the CAR comprises a target binding domainthat comprises a DD that comprising an amino acid sequence selected fromSEQ ID NO: 11-305, and 306; SEQ ID NO: 307-739, and 740; SEQ ID NO:741-874 and 886-895; SEQ ID NO: 896-909 and 910; or SEQ ID NO: 911-949,and 950 and a transmembrane domain. In some embodiments, the CAR furthercomprise an intracellular domain (comprising a signaling domain). Insome embodiments, the CAR immune cell is a T cell. In some embodiments,the CAR immune cell is a NK cell. In some embodiments, the CAR immunecell is not a T cell or an NK cell. In some embodiments, the host cellis an immune cell that further comprises a second CAR polypeptide havinga DD or other binding domain (e.g., scFv) that specifically binds thesame or a different target (e.g., a different epitope of the sametarget, or a second target of interest) expressed by the cancer cell) asthe first CAR expressed by the host immune cell.

Also provided are mammalian cells that generate membrane-boundvirus-like particles (VLPs), wherein the mammalian cell is engineered toexpress a fusion protein comprising D domain polypeptide (DDpp) fused toa chimeric antigen receptor (CAR), the fusion protein being expressed onthe generated VLPs (e.g., as transmembrane proteins). Depending on theembodiments, the VLPs produced by the mammalian cells are suitable foruse as immunogens for antibody generation.

Pharmaceutical compositions containing a protein comprising a DDdisclosed herein, nucleic acids encoding the proteins, vectorscontaining the nucleic acids, and host cells containing the nucleicacids and or vectors are also provided. As are kits containing one ormore of the disclosed target-binding DDpps (e.g., DDpp fusion proteinssuch as DD-Fc and DD-CAR), nucleic acid molecules, vectors, and hostcells (e.g., a therapeutic kit, a diagnostic kit, a kit for researchuse, etc.).

DDpp provided herein possess activities that include but are not limitedto the ability to specifically bind a target of interest (e.g., atherapeutic target and/or diagnostic target such as BCMA, CD123, CS1,HER2, AFP, and AFP p26, a peptide tag, and a serum protein such asalpha-fetoprotein, human serum albumin (HSA) or an immunoglobulin) invitro or in vivo and the ability to serve as a reactive site for linkingor associating a protein such as a DDpp fusion protein with one or moreadditional moieties (e.g., a solid support), and/or other modifications.The DDpp provided herein can also possess additional desirableproperties and/or functionalities useful in manufacturing, formulationand biological, diagnostic, and therapeutic applications.

In some embodiments, the DDpp is used to bind, detect, and/orquantitate, a target of interest (e.g., BCMA, CD123, CS1, HER2, AFP, orAFP p26) in a sample containing the target. In one embodiment, thedisclosure provides a method for detecting a target of interest (e.g.,BCMA, CD123, CS1, HER2, AFP, or AFP p26) in a sample, comprising: (a)contacting the sample with a DDpp containing a DD that comprises anamino acid sequence selected from the group consisting of SEQ ID NO:11-949, and 950, that specifically binds the target, under conditionssuitable for specific binding of the DDpp to the target, to form atarget/DDpp complex, and (b) detecting the presence of the complexand/or captured target. In some embodiments, the DDpp is immobilized ona solid support. In some embodiments, the DD comprises an amino acidsequence selected from the group consisting of SEQ ID NO: 11-305 or 306,and the DDpp us used to bind, detect, and/or quantitate, BCMA or afusion protein comprising BCMA in a sample. In some embodiments, the DDcomprises an amino acid sequence selected from the group consisting ofSEQ ID NO: 307-739 or 740, and the DDpp us used to bind, detect, and/orquantitate, CD123 or a fusion protein comprising CD123 in a sample. Insome embodiments, the DD comprises an amino acid sequence selected fromthe group consisting of SEQ ID NO: 741-874 or 886-895, and the DDpp usused to bind, detect, and/or quantitate, AFP p26, or a fusion proteincomprising AFP p26 in a sample. In some embodiments, the DD comprises anamino acid sequence selected from the group consisting of SEQ ID NO:896-909 or 910, and the DDpp us used to bind, detect, and/or quantitate,CS1, or a fusion protein comprising CS1 in a sample. In someembodiments, the DD comprises an amino acid sequence selected from thegroup consisting of SEQ ID NO: 911-949 or 950, and the DDpp us used tobind, detect, and/or quantitate, HER2, or a fusion protein comprisingHER2 in a sample.

Also provided is a method for quantifying a target of interest (e.g.,BCMA, CD123, CS1, HER2, AFP, or AFP p26) in a sample containing thetarget, comprising: (a) contacting the sample with a DDpp containing aDD that comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 11-949, and 950, that specifically binds thetarget and that is immobilized on a solid support, under conditionssuitable for specific binding of the DDpp to the target, to form atarget/DDpp complex and (b) detecting the presence of the target/DDppcomplex and/or captured target, wherein quantitative detection of theproduct indicates, or is otherwise able to be correlated with, thequantity of the target or a fusion protein containing the target in thesample.

In additional embodiments, the provided DDpps are used in proteinanalytics. In some embodiments, the DDpps are conjugated to a detectableagent and/or tag. In some embodiments, the DDpp comprises an amino acidsequence selected from the group consisting of SEQ ID NO: 11-305, and306; SEQ ID NO: 307-739, and 740; SEQ ID NO: 741-874 and 886-895; SEQ IDNO: 896-909 and 910; or SEQ ID NO: 911-949, and 950. In otherembodiments, the DDpp comprises a variant of an amino acid sequenceselected from the group consisting of SEQ ID NO: 11-305, and 306; SEQ IDNO: 307-739, and 740; or SEQ ID NO: 741-874 and 886-895; SEQ ID NO:896-909 and 910; or SEQ ID NO: 911-949, and 950. In some embodiments,the DDpp is conjugated to a detectable agent. In one embodiment, thedetectable agent comprises a chromogen. In another embodiment, thedetectable agent comprises a fluorescent dye. In and additionalembodiment, the detectable agent comprises a radionuclide. In someembodiments, the DDpp is conjugated to the detectable agent by covalentbinding. In some embodiments, the DDpp is a fusion protein. Inadditional embodiments, the DDpp is multimeric. In additionalembodiments, the DDpp is conjugated to a tag. In some embodiments, thetag is a member selected from the group consisting of: a polyhistidyltag, a myc tag, and a FLAG tag. In further embodiments, the DDpp isconjugated to a combination of tags (e.g., a polyhistidyl tag and a FLAGtag). In some embodiments, the DDpp is conjugated to the tag(s) bycovalent binding. In some embodiments, the DDpp is a fusion protein. Insome embodiments, the DDpp is multimeric.

In additional embodiments, the DDpp is conjugated to a solid support ortag. In some embodiments, the solid support is a chromatography bead,resin, glass slide, chip, gelatin, or agarose.

Methods of using DDpp in diagnostic and therapeutic applications arealso provided. In one embodiment, the disclosure provides a method oftreating a disease or disorder comprising administering atherapeutically effective amount of a DDpp (e.g., a DDpp fusion protein)that specifically binds a therapeutic target of interest (e.g., BCMA,CD123, CS1, HER2, AFP, or AFP p26) to a subject in need thereof. In someembodiments, the disease or disorder is cancer, a B cell malignancy, adisease or disorder of the immune system, or an infection. Methods oftreating a disease or disorder that comprises co-administering anadditional therapeutic agent along with a disclosed DDpp are alsoprovided. In some embodiments, the disease or disorder is multiplemyeloma. In some embodiments, the disease or disorder is breast canceror ovarian cancer.

The target binding DDpps disclosed herein have uses that includediagnostic and therapeutic applications. In some embodiments, the DDppsare useful in a therapeutic context, e.g., for treatment and/ordiagnosis of a disease, such as a cancer (e.g., a solid or hematologicmalignancy).

In some embodiments, the disclosure provides a method of treating asubject having cancer, the method comprising: administering to thesubject a therapeutically effective amount of: a protein (i.e., DDpp)containing a DD disclosed herein (e.g., disclosed in Table 1, or havingthe amino acid sequence of SEQ ID NO: 11-949, or 950): a nucleic acidencoding the protein; a vector containing the nucleic acid: or a hostcell containing the nucleic acid or vector. In some embodiments, theDDpp comprises a DD amino acid sequence that specifically binds BCMA. Insome embodiments, a DD of the DDpp specifically binds BCMA having anamino acid sequence consisting of SEQ ID NO: 7. In further embodiments,the DDpp comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 11-305, and 306. In some embodiments, the DDppcomprises a DD amino acid sequence that specifically binds CD123. Insome embodiments, a DD of the DDpp specifically binds CD123 having anamino acid sequence consisting of SEQ ID NO: 8. In further embodiments,the DDpp comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 307-739, and 740. In some embodiments, the DDppcomprises a DD amino acid sequence that specifically binds CS1. In someembodiments, a DD of the DDpp specifically binds CS1 having an aminoacid sequence consisting of SEQ ID NO: 965. In further embodiments, theDDpp comprises an amino acid sequence selected from the group consistingof SEQ ID NO: 896-909, and 910. In some embodiments, the DDpp comprisesa DD amino acid sequence that specifically binds HER2. In someembodiments, a DD of the DDpp specifically binds HER2 having an aminoacid sequence consisting of SEQ ID NO: 967. In further embodiments, theDDpp comprises an amino acid sequence selected from the group consistingof SEQ ID NO: 911-949, and 950. In some embodiments, the DDpp comprisesa DD amino acid sequence that specifically binds AFP. In someembodiments, a DD of the DDpp specifically binds AFP having an aminoacid sequence consisting of SEQ ID NO: 9. In further embodiments, theDDpp comprises an amino acid sequence selected from the group consistingof SEQ ID NO: 741-874 and 886-895. In some embodiments, the DDppspecifically binds AFP p26 having an amino acid sequence consisting ofSEQ ID NO: 10. In further embodiments, the DDpp comprises an amino acidsequence selected from the group consisting of SEQ ID NO: 741-874 and886-895. In some embodiments, a DD of the DDpp specifically binds AFPp26 but does not specifically bind AFP having an amino acid sequenceconsisting of SEQ ID NO: 9. In further embodiments, the DDpp comprisesan amino acid sequence selected from the group consisting of SEQ ID NO:741-874 and 886-895.

In some embodiments, the disclosure provides a method of treating asubject having a B cell malignancy, said method comprising:administering to the subject an effective amount of: a proteincontaining a DD disclosed herein (e.g., disclosed in Table 1, or havingthe amino acid sequence of SEQ ID NO: 11-949, or 950); a nucleic acidencoding the protein; a vector containing the nucleic acid: or a hostcell containing the nucleic acid or vector. In some embodiments, the Bcell malignancy is selected from the group consisting of: a lymphoma(e.g., a Hodgkin's lymphoma and non-Hodgkin's lymphoma (NHL), aleukemia, and a myeloma. In some embodiments, the B cell malignancy isselected from the group consisting of: acute lymphocytic leukemia,chronic lymphocytic leukemia, follicular lymphoma, mantle cell lymphoma,and diffuse large B-cell lymphoma, plasmacytoma, and multiple myeloma.

In some embodiments, the disclosure provides a method of treating asubject having cancer, the method comprising: administering to thesubject an immune cell comprising a chimeric antigen receptor (CAR),wherein the CAR comprises: a target binding domain comprising a DDhaving an amino acid sequence selected from the group consisting of SEQID NO: 11-949, and 950, wherein the polypeptide specifically binds atarget of interest and a transmembrane domain. In further embodiments,the target of interest is expressed by a cancer cell. In someembodiments, the DD specifically binds BCMA having an amino acidsequence consisting of SEQ ID NO: 7. In further embodiments, the DDcomprises an amino acid sequence selected from the group consisting ofSEQ ID NO: 11-305, and 306. In some embodiments, the DD specificallybinds CD123 having an amino acid sequence consisting of SEQ ID NO: 8. Infurther embodiments, the DD comprises an amino acid sequence selectedfrom the group consisting of SEQ ID NO: 307-739, and 740. In someembodiments, the DD specifically binds CS1 having an amino acid sequenceconsisting of SEQ ID NO: 965. In further embodiments, the DD comprisesan amino acid sequence selected from the group consisting of SEQ ID NO:896-909, and 910. In some embodiments, the DD specifically binds HER2having an amino acid sequence consisting of SEQ ID NO: 967. In furtherembodiments, the DD comprises an amino acid sequence selected from thegroup consisting of SEQ ID NO: 911-949, and 950. In some embodiments,the DD specifically binds AFP p26 having an amino acid sequenceconsisting of SEQ ID NO: 10. In further embodiments, the DD comprises anamino acid sequence selected from the group consisting of SEQ ID NO:741-874, and 886-895. In some embodiments, the CAR comprises anintracellular domain. In further embodiments, the intracellular domaincomprises a signaling domain, wherein, upon administration to a subjecthaving cancer, the target binding domain specifically binds to thetarget of interest expressed by a cancer cell (e.g., BCMA and CD123),and wherein the binding of the target of interest induces the immunecell to generate cytotoxic signals that result in cytotoxic effects onthe cancer cell. In some embodiments, the immune cell is a T cell. Inother embodiments, the immune cell is a NK cell. In some embodiments,the administered CAR immune cell is not a T cell or an NK cell. Infurther embodiments, a combination of different CAR immune cell types(e.g., NK cells and T cells) is administered to the subject. In someembodiments, the immune cell administration is intravenous. In someembodiments, a combination of different CAR immune cell types isadministered intravenously to the subject. In some embodiments, thecancer is multiple myeloma. In some embodiments, the cancer is breastcancer or ovarian cancer.

In some embodiments, the disclosure provides a method of treating asubject having a B cell malignancy, said method comprising:administering to the subject an immune cell comprising a chimericantigen receptor (CAR), wherein the CAR comprises: a target bindingdomain comprising a polypeptide having an amino acid sequencecomprising, the polypeptide having an amino acid sequence selected fromthe group consisting of SEQ ID NO: 11-949, and 950, wherein thepolypeptide specifically binds a target of interest expressed by acancer cell, a transmembrane domain and an intracellular domain. In someembodiments, the target binding domain specifically binds BCMA having anamino acid sequence consisting of SEQ ID NO: 7. In further embodiments,the target binding domain comprises an amino acid sequence selected fromthe group consisting of SEQ ID NO: 11-305, and 306. In some embodiments,the target binding domain specifically binds CD123 having an amino acidsequence consisting of SEQ ID NO: 8. In further embodiments, the targetbinding domain comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 307-739, and 740. In some embodiments, thetarget binding domain specifically binds CS1 having an amino acidsequence consisting of SEQ ID NO: 965. In further embodiments, thetarget binding domain comprises an amino acid sequence selected from thegroup consisting of SEQ ID NO: 896-909, and 910. In some embodiments,the CAR comprises an intracellular domain. In further embodiments, theintracellular domain comprises a signaling domain, wherein, uponadministration to a subject having cancer, the target binding domainspecifically binds to the target of interest expressed by a malignant Bcell (e.g., BCMA, CS1, and CD123), and wherein the binding of the targetof interest induces the immune cell to generate cytotoxic signals thatresult in cytotoxic effects on the malignant B cancer cell. In someembodiments, the B cell malignancy is selected from the group consistingof: a lymphoma (e.g., a Hodgkin's lymphoma and non-Hodgkin's lymphoma(NHL), a leukemia, and a myeloma. In some embodiments, the B cellmalignancy is selected from the group consisting of: acute lymphocyticleukemia, chronic lymphocytic leukemia, follicular lymphoma, mantle celllymphoma, diffuse large B-cell lymphoma, plasmacytoma and multiplemyeloma. In some embodiments, the B cell malignancy is multiple myeloma.In some embodiments, the immune cell is a T cell. In other embodiments,the immune cell is a NK cell. In some embodiments, the administered CARimmune cell is not a T cell or an NK cell. In further embodiments, acombination of different CAR immune cell types (e.g., NK cells and Tcells) is administered to the subject. In some embodiments, the immunecell administration is intravenous. In some embodiments, a combinationof different CAR immune cell types is administered intravenously to thesubject.

In some embodiments, the disclosure provides a method of treating asubject having a B cell associated disorder, said method comprising:administering to the subject an effective amount of: a proteincontaining a DD disclosed herein (e.g., a DD having an amino acidsequence disclosed in Table 1, or having the amino acid sequence of SEQID NO: 11-949, or 950); a nucleic acid encoding the protein; a vectorcontaining the nucleic acid; or a host cell containing the nucleic acidor vector.

In some embodiments, the disclosure provides a method of treating asubject having a disorder of the immune system, said method comprising:administering to the subject an effective amount of: a proteincomprising a DD disclosed herein (e.g., a DD having an amino acidsequence disclosed in Table 1, or having the amino acid sequence of SEQID NO: 11-949, or 950); a nucleic acid encoding the protein; a vectorcontaining the nucleic acid; or a host cell containing the nucleic acidor vector. In some embodiments, the disorder of the immune system is anautoimmune disease such as rheumatoid arthritis.

In some embodiments, the disclosure provides for the use of acomposition for treating cancer, wherein the composition comprises: aprotein containing a DD disclosed herein (e.g., a DD having an aminoacid sequence disclosed in Table 1, or having the amino acid sequence ofSEQ ID NO: 11-949, or 950); a nucleic acid encoding the protein; avector containing the nucleic acid; or a host cell containing thenucleic acid or vector. In some embodiments, the cancer is a B cellmalignancy. In some embodiments, the B cell malignancy is selected fromthe group consisting of: a lymphoma (e.g., a Hodgkin's lymphoma andnon-Hodgkin's lymphoma (NHL), a leukemia, and a myeloma. In someembodiments, the B cell malignancy is selected from the group consistingof: acute lymphocytic leukemia, chronic lymphocytic leukemia, follicularlymphoma, mantle cell lymphoma, diffuse large B-cell lymphoma,plasmacytoma, and multiple myeloma. In some embodiments, the cancer ismultiple myeloma. In some embodiments, the cancer is breast cancer orovarian cancer.

In some embodiments, the disclosure provides for the use of acomposition for treating a B cell malignancy, wherein the compositioncomprises: a protein containing a DD disclosed herein (e.g., a DD havingan amino acid sequence disclosed in Table 1, or having the amino acidsequence of SEQ ID NO: 11-949, or 950); a nucleic acid encoding theprotein; a vector containing the nucleic acid; or a host cell containingthe nucleic acid or vector. In some embodiments, the B cell malignancyis selected from the group consisting of: a lymphoma (e.g., a Hodgkin'slymphoma and non-Hodgkin's lymphoma (NHL), a leukemia, and a myeloma. Insome embodiments, the B cell malignancy is selected from the groupconsisting of: acute lymphocytic leukemia, chronic lymphocytic leukemia,follicular lymphoma, mantle cell lymphoma, diffuse large B-celllymphoma, plasmacytoma and multiple myeloma. In some embodiments, the Bcell malignancy is multiple myeloma.

In some embodiments, the disclosure provides for the use of acomposition for the treatment of a B cell associated disorder, whereinthe composition comprises: a protein containing a DD disclosed herein(e.g., a DD having an amino acid sequence disclosed in Table 1, orhaving the amino acid sequence of SEQ ID NO: 11-949, or 950); a nucleicacid encoding the protein; a vector containing the nucleic acid; or ahost cell containing the nucleic acid or vector.

In some embodiments, the disclosure provides for the use of acomposition for the treatment of a disorder of the immune system,wherein the composition comprises: a protein containing a DD disclosedherein (e.g., a DD having an amino acid sequence disclosed in Table 1,or having the amino acid sequence of SEQ ID NO: 11-949, or 950); anucleic acid encoding the protein: a vector containing the nucleic acid;or a host cell containing the nucleic acid or vector. In someembodiments, disorder of the immune system is an autoimmune disease suchas rheumatoid arthritis.

In additional embodiments, the disclosure provides for use of an immunecell comprising a chimeric antigen receptor (CAR) for the treatment ofcancer, wherein the CAR comprises: a target binding domain comprising apolypeptide having an amino acid sequence comprising, the polypeptidehaving an amino acid sequence selected from the group consisting of SEQID NO: 11-949, and 950, wherein the polypeptide specifically binds atarget of interest expressed by a cancer cell, a transmembrane domainand an intracellular domain, wherein the intracellular domain comprisesa signaling domain, wherein, upon administration to a subject havingcancer, the target binding domain specifically binds to the target ofinterest expressed by a cancer cell, and wherein the binding of thetarget of interest induces the immune cell to generate cytotoxic signalsthat result in cytotoxic effects on the cancer cell. In someembodiments, the immune cell is a T cell or a natural killer (NK) cell.In some embodiments, the immune cell is a T cell. In some embodiments,the immune cell is a natural killer (NK) cell. In some embodiments, theimmune cell is not a T cell or an NK cell. In further embodiments, acombination of different CAR immune cell types (e.g., T cells and NKcells) is used. In some embodiments, the cancer is multiple myeloma. Insome embodiments, the cancer is breast cancer or ovarian cancer.

In additional embodiments, the disclosure provides for use of an immunecell comprising a chimeric antigen receptor (CAR) for the treatment of aB cell malignancy, wherein the CAR comprises: a target binding domaincomprising a polypeptide having an amino acid sequence comprising, thepolypeptide having an amino acid sequence selected from the groupconsisting of SEQ ID NO: 11-949, or 950, wherein the polypeptidespecifically binds a target of interest (e.g., a target expressed by amalignant B cell, such as BCMA. CS1, or CD123, wherein the targetbinding domain comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 11-306, 307-740, and 896-910), a transmembranedomain and an intracellular domain, wherein the intracellular domaincomprises a signaling domain, wherein, upon administration to a subjecthaving cancer, the target binding domain specifically binds to thetarget of interest expressed by a malignant B cell, and wherein thebinding of the target of interest induces the immune cell to generatecytotoxic signals that result in cytotoxic effects on the malignant Bcell. In some embodiments, the immune cell is a T cell or a naturalkiller (NK) cell. In some embodiments, the immune cell is a T cell. Insome embodiments, the immune cell is a natural killer (NK) cell. In someembodiments, the immune cell is not a T cell or an NK cell. In furtherembodiments, a combination of different CAR immune cell types (e.g., Tcells and NK cells) is used. In some embodiments, the B cell malignancyis multiple myeloma.

In additional embodiments, the disclosure provides for use of an immunecell comprising a chimeric antigen receptor (CAR) for the treatment of adisorder of the immune system, wherein the CAR comprises: a targetbinding domain comprising a polypeptide having an amino acid sequencecomprising, the polypeptide having an amino acid sequence selected fromthe group consisting of SEQ ID NO: 11-949, and 950, wherein thepolypeptide specifically binds a target of interest expressed by theimmune cell to be targeted, a transmembrane domain and an intracellulardomain, wherein the intracellular domain comprises a signaling domain,wherein, upon administration to a subject having the disorder of theimmune system, the target binding domain specifically binds to thetarget of interest expressed by the targeted immune cell, and whereinthe binding of the target of interest induces the recombinant immunecell to generate cytotoxic signals that result in cytotoxic effects onthe targeted immune cell. In some embodiments, the immune cell is a Tcell or a natural killer (NK) cell. In some embodiments, the immune cellis not a T cell or an NK cell. In some embodiments, the immune cell is anatural killer (NK) cell. In some embodiments, the immune cell is not aT cell or an NK cell. In further embodiments, a combination of differentCAR immune cell types (e.g., T cells and NK cells) is used.

The methods summarized above and/or set forth herein describe certainactions taken by a practitioner; however, it should be understood thatthey can also include the instruction of those actions by another party.Thus, actions such as “administering a T cell comprising a targetspecific binding polypeptide-CAR” include “instructing theadministration of a T cell comprising a target specific bindingpolypeptide-CAR.”

In some embodiments, the disclosure provides:

Gg

-   [1.] A protein comprising a D Domain (DD) target binding domain    wherein the DD is a member selected from the group consisting of:    -   (a) a DD that specifically binds BCMA and comprises the amino        acid sequence of SEQ ID NO: 11-305, or 306;    -   (b) a DD that specifically binds CD123 and comprises the amino        acid sequence of SEQ ID NO: 307-739, or 740;    -   (c) a DD that specifically binds AFP and comprises the amino        acid sequence of SEQ ID NO: 741-874, or 886-895;    -   (d) a DD that specifically binds AFP p26 and comprises the amino        acid sequence of SEQ ID NO: 741-874, or 886-895;    -   (e) a DD that specifically binds CS1 and comprises the amino        acid sequence of SEQ ID NO: 896-909, or 910; and    -   (f) a DD that specifically binds HER2 and comprises the amino        acid sequence of SEQ ID NO: 911-949, or 950;-   [2.] the protein of [1], wherein the DD is fused to a heterologous    polypeptide;-   [3.] the protein of [2], wherein the heterologous polypeptide    comprises a full-length antibody or an antibody fragment;-   [4.] the protein of [2], wherein the heterologous polypeptide    comprises a member selected from the group consisting of;    -   (a) a transmembrane domain;    -   (b) a membrane associating domain;    -   (c) human serum albumin or a fragment thereof;    -   (d) AFP or a fragment thereof;    -   (e) AFP p26 or a fragment thereof; and    -   (f) the extracellular domain of a receptor or a fragment        thereof;-   [5.] the protein of [3], wherein the DD is fused to: the amino    terminus of a full-length antibody heavy chain; the amino terminus    of a full-length antibody light chain; the carboxyl terminus of a    full-length antibody heavy chain; or the carboxyl terminus of a    full-length antibody light chain;-   [6.] the protein of [3], wherein the heterologous polypeptide is an    Fc;-   [7.] the protein of [2], wherein the heterologous polypeptide    comprises the extracellular domain, or a fragment of an    extracellular domain, of a receptor selected from the group    consisting of: BCMA, CD123, CS1, and CD19;-   [8.] the protein according to any one of [1]-[7], which is labeled;-   [9.] the protein according to [9, wherein the label is selected from    the group consisting of an enzymatic label, a fluorescent label, a    luminescent label, a bioluminescent label and a biotin moiety;-   [10.] a protein according to any one of [1]-[10], which conjugated    to a therapeutic or cytotoxic agent;-   [11.] a chimeric antigen receptor (CAR) which comprises a target    binding domain comprising the protein according to any one of    [1]-[5];-   [12.] the CAR of [11], which comprises, a target binding domain, a    transmembrane domain, and an intracellular signaling domain;-   [13.] the CAR of [11] or [12], wherein transmembrane domain    comprises a 41BB or CD28 transmembrane domain;-   [14.] the CAR according to any one of [11]-[13], wherein the    intracellular signaling domain is selected from the group consisting    of a domain of a human T cell receptor alpha, beta, or zeta chain; a    human 41BB domain; a human CD28 domain; and any combination thereof;-   [15.] a CAR according to any one of [11]-[14], wherein the    intracellular signaling domain comprises the intracellular domain of    a costimulatory molecule selected from the group consisting of CD27,    CD28, 41BB, OX40, CD30, CD40, PD1, lymphocyte function-associated    antigen-1 (LFA-1), CD2, CD7, LIGHT, NKG2C, NKG2D, B7-H3, a ligand    that specifically binds with CD83, and any combination thereof;-   [16.] a protein according to any on of [1]-[15], which further    comprises a second target binding domain having the same or a    different target than the DD target binding domain;-   [17.] an isolated nucleic acid encoding the protein according to any    one of [1]-[16];-   [18.] a vector comprising the nucleic acid of [17];-   [19.] the vector of [18], wherein the nucleic acid is operably    linked with a nucleotide sequence which regulates the expression of    the protein encoded by the nucleic acid;-   [20.] the vector of [19] which is a lentiviral vector;-   [21.] a host cell comprising the nucleic acid according to [17] or    the vector according to any one of [18-21;-   [22.] a cell engineered to express the protein according to any one    of [1]-[16];-   [23.] a cell according to [21] or [22], wherein the cell is a T cell    or a natural killer (NK) cell;-   [24.] a pharmaceutical composition comprising the protein according    to any one of [1]-[16], the nucleic acid of [17], the vector of    [18], [19] or [20], or the cell according to any one of [21]-[23];-   [25.] a kit comprising the protein according to any one of [1]-[16];-   [26.] a method of treating a subject having cancer, the method    comprising:    -   administering to the subject an effective amount of a protein        according to any one of [1]-[16], the nucleic acid of [17], the        vector of [18], [19] or [20], the cell according to any one of        [21]-[23], or the pharmaceutical composition according to [24];-   [26.] the method of [26], wherein the cancer is a B cell malignancy    selected from the group consisting of: a lymphoma (e.g., a Hodgkin's    lymphoma and non-Hodgkin's lymphoma (NHL), a leukemia, a    plasmacytoma and a myeloma;-   [28.] the method of [27], wherein the B cell malignancy is selected    from the group consisting of: chronic lymphocytic leukaemia,    follicular lymphoma, mantle cell lymphoma, and diffuse large B-cell    lymphoma, plasmacytoma and multiple myeloma;-   [27.] the method of [26], wherein the cancer is a myeloid malignancy    selected from the group consisting of: chronic myeloid leukemia,    acute myeloid leukemia, leukemia, plasmacytoma and myeloma;-   [29.] a method of treating a subject having a B cell associated    disorder (e.g., monoclonal gammapathy of determined significance),    (MGUS)), the method comprising: administering to the subject an    effective amount of a protein according to any one of [1]-[16], the    nucleic acid of [17], the vector of [18], [19] or [20], the cell    according to any one of [21]-[23], or the pharmaceutical composition    according to [24];-   [30.] a method of treating a subject having a disorder of the immune    system, the method comprising: administering to the subject an    effective amount of a protein according to any one of [1]-[16], the    nucleic acid of [17], the vector of [18], [19] or [20], the cell    according to any one of [21]-[23], or the pharmaceutical composition    according to [24];-   [31.] the method of [30], wherein the disorder of the immune system    is an autoimmune disease such as rheumatoid arthritis;-   [32.] a method of treating a subject having cancer, the method    comprising:    -   administering an immune cell comprising a chimeric antigen        receptor (CAR) to the subject, wherein the CAR comprises: a        target binding domain comprising a DD having an amino acid        sequence selected from the group consisting of SEQ ID NO:        11-949, and 950, optionally wherein the DD specifically binds a        target of interest expressed by a cancer cell;    -   a transmembrane domain and an intracellular domain; wherein the        intracellular domain comprises a signaling domain, and wherein,        upon administration to a subject, the target binding domain        specifically binds to the target of interest expressed by a        cancer cell, and    -   wherein the binding of the target of interest induces the immune        cell to generate cytotoxic signals that result in cytotoxic        effects on the cancer cell;-   [33.] the method of [32], wherein the immune cell is a T cell;-   [34.] the method of [32], wherein the immune cell is a NK cell;-   [35.] the method of [32] wherein the administration is intravenous;-   [36.] use of a composition for treating cancer, wherein the    composition comprises: a protein according to any one of [1]-[16],    the nucleic acid of [17], the vector of [18], [19] or [20], or the    cell according to any one of [21]-[23];-   [37.] the use according to [36], wherein the cancer is a B cell    malignancy;-   [38.] the use according to [37], wherein the B cell malignancy is    selected from the group consisting of: a lymphoma (e.g., a Hodgkin's    lymphoma and non-Hodgkin's lymphoma (NHL), a leukemia, and a    myeloma;-   [39.] the use according to [38], wherein the B cell malignancy    wherein the B cell malignancy is selected from the group consisting    of: chronic lymphocytic leukaemia, follicular lymphoma, mantle cell    lymphoma, and diffuse large B-cell lymphoma;-   [40.] use of a composition for the treatment of a B cell associated    disorder, wherein the composition comprises: a protein according to    any one of [1]-[16], the nucleic acid of [17], the vector of [18],    [19] or [20], the cell according to any one of [21]-[23], or the    pharmaceutical composition according to [24]-   [41.] use of a composition for the treatment of a disorder of the    immune system, wherein the composition comprises: a protein    according to any one of [1]-[16], the nucleic acid of [17], the    vector of [18], [19] or [20], the cell according to any one of    [21]-[23], or the pharmaceutical composition according to [24]-   [42.] the use according to [41], wherein the disorder of the immune    system is an autoimmune disease such as rheumatoid arthritis;-   [43.] use of an immune cell comprising a chimeric antigen receptor    (CAR) for the treatment of cancer, wherein the CAR comprises: a    target binding domain comprising a DD comprising an amino acid    sequence selected from the group consisting of SEQ ID NO: 11-949, or    950, and optionally wherein the target binding domain specifically    binds a target of interest expressed by a cancer cell,    -   a transmembrane domain and an intracellular domain, wherein the        intracellular domain comprises a signaling domain, wherein, upon        administration to a subject having cancer, the target binding        domain specifically binds to the target of interest expressed by        a cancer cell, and    -   wherein the binding of the target of interest induces the immune        cell to generate cytotoxic signals that result in cytotoxic        effects on the cancer cell;-   [44.] the use according to [43], wherein the immune cell is a T cell    or a natural killer (NK) cell.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1A-1B, DDpp impart novel binding specificities to another molecule(e.g., a full length antibody) as part of a fusion protein (e.g., anantibody-DDpp fusion protein. DDpp-antibody fusions were created usingan RSV-specific antibody (SYN) and either the target-less peptide of SEQID NO: 1 (DD) or the CD137-specific DDpp (bb10) (SEQ ID NO: 876). TheDDpp are fused to the N-terminus (bb10-SYN and DD-SYN) or the C-terminus(SYN-bb10 and SYN-DD). All four antibody fusions bind to RSV (FIG. 1A).However, the fusion of bb10 to either the N-terminus (bb10-SYN) orC-terminus (SYN-bb10) of the antibody heavy chain imparts a novel CD137binding specificity to an otherwise mono-specific antibody (FIG. 1B).

FIGS. 2A-2F. CD123-DDpp-CAR T cells produce cytokines in response totarget binding. FIGS. 2A and 2B show data related to the production ofinterferon gamma (IFNγ) by T cells expressing CD123-DDpp-CARs whenco-cultured with CD123 negative tumor K562 and CD123 positive tumorBDCM, respectively.

FIGS. 2C and 2D depicts similar data measuring the production ofinterleukin-2 (IL2) by CD123-DDpp-CAR T cells when co-cultured with K562and BDCM, respectively. FIGS. 2E and 2F show similar target-drivencytokine (IFNγ, IL2) by PD-L1-DDppCAR T cells when co-cultured with PDL1expressing tumor cells (SUDHL-1).

FIGS. 3A-3B. T cells expressing DDpp-CARs do not undergo excessiveexhaustion to a greater degree than scFv. FIG. 3A depicts expression ofthree exhaustion markers (LAG3, PD1, and TIM3) on T cells expressingvarious DDpp-CARs at similar levels of the expression of those markerson scFv-CAR 32716 (32716 (Du X1, Ho M, Pastan I. 2007. New immunotoxinstargeting CD123, a stem cell antigen on acute myeloid leukemia cells. JImmunother. 30(6): 607-13). FIG. 3B shows flow cytometry data depictingsimilar exhaustion marker expression on DDpp-CAR T cells (expressingCD123 targeting cg06 DDpp) as compared to a CAR T cell expressingCD123-specific scFv (32716).

FIGS. 4A-4C. T cells expressing DDpp-CARs (CD123-targeting) undergodegranulation when co-cultured with target-expressing tumor cells(BDCM). FIGS. 4A-4C show results obtained by culturing T cells alone(FIG. 4A) or in the presence of K562 (FIG. 4B) or BDCM (FIG. 4C) cells.

FIGS. 5A-5D. T cells expressing DDpp-CARs mediate target-specific tumorcytotoxicity. FIG. 5A shows data related to CD123-DDpp-CAR T cells killpercentage of K562 tumor cells that are negative for CD123. FIG. 5Bshows kill percentages when the CD123 targeting DDpp-CAR T cells areco-cultured with CD123 positive BDCM cells. The data from FIGS. 5A and5B were generated using T cells from a first donor blood sample. FIGS.5C and 5D show similar data from T cells collected from a second donor.

FIGS. 6A-6E. Bi-specific DDpp-CAR T cells. FIG. 6A shows the percentageof T cells expressing CD123 targeting DDpp-CARs (cg06). FIG. 6B showsthe percentage of T cells expressing PDL1 targeting DDpp-CARs (pb04).FIG. 6C shows the percentage of T cells expressing bi-specificCD123-PDL1 targeting DDpp-CARs (expressed with cg06 DDpp distal to the Tcell membrane versus the pb04 DDpp). FIG. 6D shows the percentage of Tcells expressing bi-specific PDL1-CD123 targeting DDpp-CARs (expressedwith pb04 DDpp distal to the T cell membrane versus the cg06 DDpp). FIG.6E depicts data related to the increased intracellular signaling ofbispecific DDpp.

FIGS. 7A and 7B show that dual-binding domain adaptor proteins driveenhanced signaling by CAR-expressing Jurkat NFAT-Luciferase reportercells over single-binding domain adaptor proteins. In FIG. 7A, 50,000reporter cells previously transduced with an AFP (p26 domain)-bindingCAR (af03) were cultured for 5 hours in the presence of theCD123-specific Cg06-adaptor (Cg06-p26) or the Cg06-dual adaptor protein(Cg06-p26-Cg06 in the presence of 50,000 CD123* MOLM13 orCD123-deficient MOLM13 cells, then assessed for luciferase activity.CD123 deficient cells were generated using CRISPR/Cas9 geneticengineering technology. In FIG. 7B, 50,000 reporter cells previouslytransduced with an AFP (p26 domain)-binding CAR (af03) were cultured for5 hours in the presence of the BCMA-specific Bc40-adaptor (Bc40-p26) orthe Bc40-dual adaptor protein (Bc40-p26-Bc40) in the presence or absenceof 50,000 BCMA* U266 cells, then assessed for luciferase activity.

FIG. 8. The BCMA-targeting DDpp-CAR comprising the bc40 DDpp (SEQ-ID NO:164) eradicates the BCMA-expressing tumor, U226 in a mouse model of Bcell cancer.

DETAILED DESCRIPTION

The section headings used herein are for organizational purposes onlyand are not to be construed as in any way limiting of the subject matterdescribed.

Definition of Terms

It is understood that wherever embodiments, are described herein withthe language “comprising” otherwise analogous embodiments, described interms of “consisting of” and/or “consisting essentially of” are alsoprovided. However, when used in the claims as transitional phrases, eachshould be interpreted separately and in the appropriate legal andfactual context (e.g., “comprising” is considered more of an open-endedphrase while “consisting of” is more exclusive and “consistingessentially of” achieves a middle ground).

As used herein, the singular form “a”, “an”, and “the” includes pluralreferences unless indicated otherwise.

The term “and/or” as used in a phrase such as “A and/or B” herein isintended to include both A and B; A or B; A (alone); and B (alone).Likewise, the term “and/or” as used in a phrase such as “A, B, and/or C”is intended to encompass each of the following embodiments: A, B, and C;A, B, or C; A or C; A or B; B or C; A and C; A and B; B and C; A(alone); B (alone); and C (alone).

The terms “protein” and “polypeptide” are used interchangeably herein torefer to a biological polymer comprising units derived from amino acidslinked via peptide bonds; a protein can be composed of two or morepolypeptide chains.

The terms “antibody” or “immunoglobulin,” as used interchangeablyherein, include full-length antibodies and antibody fragments includingany functional domain of an antibody such as an antigen-binding fragmentor single chains thereof, an effector domain, salvage receptor bindingepitope, or portion thereof. A typical antibody comprises at least twoheavy (H) chains and two light (L) chains interconnected by disulfidebonds. Each heavy chain is comprised of a heavy chain variable region(abbreviated herein as VH) and a heavy chain constant region. The heavychain constant region is comprised of three domains, CH1, CH2, and CH3.Each light chain is comprised of a light chain variable region(abbreviated herein as VL) and a light chain constant region. The lightchain constant region is comprised of one domain, Cl. The VH and VLregions can be further subdivided into regions of hypervariablity,termed Complementarity Determining Regions (CDRs), interspersed withregions that are more conserved, termed framework regions (FW). Each VHand VL is composed of three CDRs and four FWs, arranged fromamino-terminus to carboxyl-terminus in the following order: FW1, CDR1,FW2, CDR2, FW3, CDR3, FW4. The variable regions of the heavy and lightchains contain a binding domain that interacts with an antigen. Theconstant regions of the antibodies can mediate the binding of theimmunoglobulin to host tissues or factors, including various cells ofthe immune system (e.g., effector cells) and the first component (C1q)of the classical complement system. Examples of antibodies of thepresent disclosure include typical antibodies, scFvs, and combinationsthereof where, for example, a DDpp is covalently linked (e.g., viapeptide bonds or via a chemical linker) to the N-terminus of either theheavy chain and/or the light chain of a typical whole (full-length)antibody, or intercalated in the H chain and/or the L chain of afull-length antibody.

The term “antibody fragment” refers to a portion of an intact antibodyand refers to any functional domain of an antibody such as anantigen-binding fragment or single chains thereof, an effector domain ora portion thereof, and a salvage receptor binding epitope or a portionthereof. Examples of antibody fragments include, but are not limited to,Fab, Fab′, F(ab′)2, and Fv fragments, linear antibodies, single chainantibodies, and multi-specific antibodies formed from antibodyfragments. “Antibody fragment” as used herein comprises anantigen-binding site or epitope binding site. In one embodiment, theDDpp fusion protein comprises an effector domain or portion thereof. Inone embodiment, the DDpp fusion protein comprises a salvage receptorbinding epitope, or portion thereof.

As used herein, the term, “Fc region” or simply “Fc” is understood tomean the carboxyl-terminal portion of an immunoglobulin chain constantregion, preferably an immunoglobulin heavy chain constant region, or aportion thereof. For example, an immunoglobulin Fc region may comprise(1) a CH1 domain, a CH2 domain, and a CH3 domain, (2) a CH1 domain and aCH2 domain, (3) a CH1 domain and a CH3 domain, 4) a CH2 domain and a CH3domain, or (5) a combination of two or more domains and animmunoglobulin hinge region. Thus, in various embodiments, Fc refers tothe last two constant region immunoglobulin domains of IgA, IgD, andIgG, and the last three constant region immunoglobulin domains of IgEand IgM, and the flexible hinge N-terminal to these domains. For IgA andIgM Fc may include the J chain. For IgG, Fc comprises immunoglobulindomains Cγ2 and Cγ3 and the hinge between Cγ1 and Cγ2. In a preferredembodiment the immunoglobulin Fc region comprises at least animmunoglobulin hinge region a CH2 domain and a CH3 domain, andpreferably lacks the CH1 domain. In one embodiment, the class ofimmunoglobulin from which the heavy chain constant region is derived isIgG (Igγ) (γ subclasses 1, 2, 3, or 4). Other classes of immunoglobulin,IgA (Igα), IgD (Igδ), IgE (Igε) and IgM (Igμ), may be used. Although theboundaries of the Fc region may vary, the human IgG heavy chain Fcregion is usually defined to comprise residues C226 or p260 to itscarboxyl-terminus, wherein the numbering is according to the EU index asset forth in Kabat (Kabat et al., Sequences of Proteins of ImmunologicalInterest, 5th Ed. Public Health Service, NIH, Bethesda, Md. (1991)). Fcmay refer to this region in isolation, or this region in the context ofa full-length antibody, antibody fragment, or Fc fusion protein.Polymorphisms have been observed at a number of different Fc positions,including but not limited to positions 270, 272, 312, 315, 356, and 358as numbered by the EU index, and thus slight differences between thepresented sequence and sequences in the prior art may exist. The choiceof appropriate immunoglobulin heavy chain constant region is discussedin detail in U.S. Pat. Nos. 5,541,087, and 5,726,044, each of which isherein incorporated by reference in its entirety. The choice ofparticular immunoglobulin heavy chain constant region sequences fromcertain immunoglobulin classes and subclasses to achieve a particularresult is considered to be within the level of skill in the art. Theportion of the DNA construct encoding the immunoglobulin Fc regionpreferably comprises at least a portion of a hinge domain, andpreferably at least a portion of a CH3 domain of Fc gamma or thehomologous domains in any of IgA, IgD, IgE, or IgM. Furthermore, it iscontemplated that substitution or deletion of amino acids within theimmunoglobulin heavy chain constant regions may be useful in thepractice of the methods and compositions disclosed herein. One examplewould be to introduce amino acid substitutions in the upper CH2 regionto create an Fc variant with reduced affinity for Fc receptors (Cole, J.Immunol. 159: 3613 (1997)).

“Antibody-dependent cell-mediated cytotoxicity” or “ADCC” refer to acell-mediated reaction in which nonspecific cytotoxic cells that expressFc receptors (FcRs) (e.g., Natural Killer (NK) cells, neutrophils, andmacrophages) recognize bound antibody on a target cell and subsequentlycause lysis (or other cytotoxic effects) of the target cell. To assessADCC activity of a molecule of interest, any in vitro ADCC assay knownin the art can be used, such as that described in U.S. Pat. No.5,500,362 or 5,821,337. Useful effector cells for such assays include,but are not limited to, peripheral blood mononuclear cells (PBMC) andNatural Killer (NK) cells. Alternatively, or additionally, ADCC activityof the molecule of interest can be assessed in vivo, e.g., in an animalmodel such as that disclosed in Clynes et al. PNAS 95: 652-656 (1998).

The terms “single chain variable fragment(s),” or “scFv” antibodies asused herein refer to forms of antibodies (e.g., antibody fragments)comprising the variable regions of only the heavy and light chains,connected by a linker peptide. In one embodiment, a DDpp fusion proteincomprises a DDpp and a scFv.

The term “linker” refers to a peptide or other chemical linkage locatedbetween a DDpp and another polypeptide of a DDpp fusion protein.Suitable linkers for coupling the two or more linked DDpp will be clearto the persons skilled in the art and non-limiting examples aredescribed herein.

The term “operably linked,” as used herein, indicates that two moleculesare attached so as to each retain at least some level of functionalactivity that each molecule had alone (assuming that each molecule had afunction activity). In embodiments, when one molecule was withoutfunctional activity, it is operably linked with another molecule if theother molecule retains at least some level of its functional activity.Operably linked can also refer to linkage of two non-functionalmolecules. Two molecules can be “operably linked” whether they areattached directly or indirectly (e.g., via a linker).

The terms “specifically binds,” “having selective affinity for,”“binds,” or “binding” are used interchangeably to mean that a bindingagent such as a DDpp reacts or associates more frequently, more rapidly,with greater duration, with greater affinity, or with some combinationof the above, to the epitope, protein, or target molecule than withalternative substances, including proteins unrelated to the targetepitope, protein, or target molecule. Because of the sequence identitybetween homologous proteins in different species, specific binding can,in some embodiments, include a binding agent that recognizes a proteinor target in more than one species. Likewise, because of homology withincertain regions of polypeptide sequences of different proteins, specificbinding can include a binding agent that recognizes more than oneprotein or target. It is understood that, in certain embodiments, abinding agent that specifically binds a first target may or may notspecifically bind a second target. As such, “specific binding” does notnecessarily require (although it can include) exclusive binding, e.g.,binding to a single target. Thus, a binding agent may, in certainembodiments, specifically bind more than one target. In certainembodiments, multiple targets may be bound by the same antigen-bindingsite on the binding agent.

“Target” refers to any molecule or combination of molecules that can bebound by a DDpp such as a DDpp fusion protein, or other component of theDDpp fusion protein such as an antibody or antibody variable domainfragment.

The terms “epitope” and “antigenic determinant” are used interchangeablyherein and refer to that portion of any molecule (e.g., a target ofinterest such as BCMA, CD123, AFP, or AFP p26) capable of beingrecognized and specifically bound by a particular binding agent (e.g.,an DDpp or antibody). When the recognized molecule is a polypeptide,epitopes can be formed from contiguous amino acids and noncontiguousamino acids and/or other chemically active surface groups of molecules(such as carbohydrates) juxtaposed by tertiary folding of a protein.Epitopes formed from contiguous amino acids are typically retained uponprotein denaturing, whereas epitopes formed by tertiary folding aretypically lost upon protein denaturing. An epitope typically includes atleast 3 amino acids, and more usually, at least 5 or 8-10 amino acids ina unique spatial conformation.

A “peptide tag” as used herein refers to a peptide sequence that is partof or attached (for instance through genetic engineering) to anotherprotein, to provide a function to the resultant fusion. Peptide tags areusually relatively short in comparison to a protein to which they arefused; by way of example, peptide tags are, in some embodiments, four ormore amino acids in length, such as, 5, 6, 7, 8, 9, 10, 15, 20, or 25 ormore amino acids. In some embodiments, the DDpp is a fusion protein thatcontains a peptide tag. In other embodiments, the DDpp specificallybinds a peptide tag. Numerous peptide tags that have uses as providedherein are known in the art. Examples of peptide tags that may be acomponent of a DDpp fusion protein or a target bound by a DDpp (e.g., aDDpp fusion protein) include but are not limited to HA (hemagglutinin),c-myc, the Herpes Simplex virus glycoprotein D (gD), T7, GST, GFP, MBP,Strep-tags, His-tags, Myc-tags, TAP-tags and FLAG® tag (Eastman Kodak,Rochester, N.Y.) Likewise, antibodies to the tag epitope allow detectionand localization of the fusion protein using techniques known in theart, such as, Western blots, ELISA assays, and immunostaining of cells.

The term “naturally occurring” when used in connection with biologicalmaterials such as a nucleic acid molecules, polypeptides, and hostcells, refers to those which are found in nature and not modified by ahuman being. Conversely, “non-natural” or “synthetic” when used inconnection with biological materials refers to those materials which arenot found in nature and have been modified by a human being.

As used herein “modifications” with respect to the sequence of areference sequence includes substitutions, deletions insertions and/oradditions of the sequence of the corresponding amino acid position ofthe reference sequence (e.g., a DD disclosed herein).

A “substitution” with respect to the sequence of a reference sequencerefers to a replacement of a particular amino acid residue with adifferent amino acid residue at a corresponding amino acid position ofthe reference sequence.

A “conservative” amino acid substitution is one in which one amino acidresidue is replaced with another amino acid residue having a similarside chain. Families of amino acid residues having similar side chainshave been defined in the art, including basic side chains (e.g., lysine(K), arginine (R), histidine (H)), acidic side chains (e.g., asparticacid (D), glutamic acid (E)), uncharged polar side chains (e.g., glycine(G), asparagine (N), glutamine (Q), serine (S), threonine T, tyrosine(Y), cysteine (C)), nonpolar side chains (e.g., alanine (A), valine (V),leucine (L), isoleucine (I), proline (P), phenylalanine (F), methionine(M), tryptophan (W), beta-branched side chains (e.g., threonine (T),valine (V), isoleucine (I)) and aromatic side chains (e.g., tyrosine(Y), phenylalanine (F), tryptophan (W), histidine (H)). For example,substitution of a phenylalanine for a tyrosine is a conservativesubstitution. In particular embodiments, conservative substitutions inthe sequences of the DDpp result in the altered or unaltered specificbinding of the DDpp containing the substitution to the target ofinterest (e.g., BCMA, CD123, AFP, or AFP p26) to which it binds. In oneembodiment, conservative substitutions in the sequences of the DDpp donot abrogate the binding of the DDpp containing the substitution to thetarget of interest to which it binds. Methods of identifying nucleotideand amino acid conservative substitutions and non-conservativesubstitutions which confer, alter or maintain selective binding affinityare known in the art (see, e.g., Brummell, Biochem. 32: 1180-1187(1993); Kobayashi, Protein Eng. 12(10): 879-884 (1999); and Burks, PNAS94: 412-417 (1997)).

A “non-conservative” amino acid substitution is one in which one aminoacid residue is replaced with another amino acid residue having adissimilar side chain. In one embodiment, non-conservative substitutionsin the sequences of the DDpp result in the specific binding of the DDppcontaining the substitution to the target of interest (e.g., BCMA,CD123, AFP, or AFP p26) to which it binds. In one embodiment,non-conservative substitutions in the sequences of the DDpp do notabrogate the binding of the DDpp containing the substitution to thetarget of interest to which it binds.

“Non-natural amino acids,” “amino acid analogs” and “non-standard aminoacid residues” are used interchangeably herein. Non-natural amino acidsthat can be substituted in a DDpp as provided herein are known in theart. In one embodiment the non-natural amino acid is 4-hydroxyprolinewhich can be substituted for proline; 5-hydroxylysine which can besubstituted for lysine; 3-methylhistidine which can be substituted forhistidine; homoserine which can be substituted for serine; and ornithinewhich can be substituted for lysine. Additional examples of non-naturalamino acids that can be substituted in a DDpp disclosed herein include,but are not limited to molecules such as: D-isomers of the common aminoacids, 2,4-diaminobutyric acid, alpha-amino isobutyric acid,A-aminobutyric acid, Abu, 2-amino butyric acid, gamma-Abu, epsilon-Ahx,6-amino hexanoic acid, Aib, 2-amino isobutyric acid, 3-amino propionicacid, ornithine, norleucine, norvaline, hydroxyproline, sarcosine,citrulline, homocitrulline, cysteic acid, t-butylglycine,t-butylalanine, phenylglycine, cyclohexylalanine, beta-alanine,lanthionine, dehydroalanine, γ-aminobutyric acid, selenocysteine andpyrrolysine fluoro-amino acids, designer amino acids such as beta-methylamino acids, C alpha-methyl amino acids, and N alpha-methyl amino acids,or combinations of non-natural amino acids. Additional non-natural aminoacids can include for example, 4-amino butyric acid,4-amino-3-hydroxy-5-phenylpentanoic acid,4-amino-3-hydroxy-6-methylheptanoic acid, 2-thienyl alanine, and/orD-isomers of amino acids. As discussed herein, in some embodiments,non-natural amino acids or amino acid analogs can include deletion ofone or more amino acids from a sequence.

The terms “polynucleotide” and “nucleic acid,” used interchangeablyherein, refer to a polymeric form of nucleotides of any length, eitherribonucleotides or deoxyribonucleotides. These terms include, but arenot limited to, DNA, RNA, cDNA (complementary DNA), mRNA (messengerRNA), rRNA (ribosomal RNA), shRNA (small hairpin RNA), snRNA (smallnuclear RNA), snoRNA (short nucleolar RNA), miRNA (microRNA), genomicDNA, synthetic DNA, synthetic RNA, and/or tRNA.

The term “naked DNA” as used herein refers to DNA (e.g., histone freeDNA) encoding a protein such as a DDpp (e.g., a CAR) disclosed herein isa DNA that is cloned in a suitable expression vector in properorientation for expression (e.g., a plasmid). Viral vectors which can beused to carry and/or express DNA encoding the DDpp include but are notlimited to SIN lentiviral vectors, retroviral vectors, foamy virusvectors, adenovirus vectors, adeno-associated virus (AAV) vectors,hybrid vectors and/or plasmid transposons (for example sleeping beautytransposon system) or integrase based vector systems. Other vectors thatcan be used in connection with making and using DDpp are describedherein or otherwise known in the art.

The terms “vector”, “cloning vector” and “expression vector” as usedherein refer to the vehicle by which a nucleic acid sequence (e.g., adisclosed DDpp coding sequence) can be maintained or amplified in a hostcell (e.g., cloning vector) or introduced into a host cell, so as totransform the host and promote expression (e.g., transcription andtranslation) of the introduced sequence. Vectors include plasmids,phages, viruses, etc.

A “host cell” includes an individual cell or cell culture which can beor has been a recipient of nucleic acids encoding a disclosed DDpp. Hostcells includes but are not limited to viral particles, phagemids,bacteria, yeast plant, animal, and mammalian cells. Host cells includeprogeny of a single host cell, and the progeny may not necessarily becompletely identical (in morphology or in total DNA complement) to theoriginal parent cell due to natural, accidental, or deliberate mutationand/or change. A host cell includes cells transfected or infected invivo, in vitro, or ex vivo with nucleic acids encoding a disclosed DDpp.In some examples, the host cell is capable of expressing and displayinga disclosed DDpp on its surface, such as for example, in phage displayor a CAR T cell. “Expression” includes transcription and/or translation.

As used herein, the terms “solid support,” “support,” “matrices,” and“resins” are used interchangeably and refer to, without limitation, anycolumn (or column material), bead, test tube, microtiter dish, solidparticle (for example, agarose or sepharose), microchip (for example,silicon, silicon-glass, or gold chip), or membrane (e.g., biologic orfilter membrane) to which a DDpp, antibody, or other protein may beattached (e.g., coupled, linked, or adhered), either directly orindirectly (for example, through other binding partner intermediatessuch as other antibodies or Protein A), or in which a DDpp or antibodymay be embedded (for example, through a receptor or channel). Reagentsand techniques for attaching polypeptides to solid supports (e.g.,matrices, resins, plastic, etc.) are well known in the art. Suitablesolid supports include, but are not limited to, a chromatographic resinor matrix (e.g., SEPHAROSE-4 FF agarose beads), the wall or floor of awell in a plastic microtiter dish, a silica based biochip,polyacrylamide, agarose, silica, nitrocellulose, paper, plastic, nylon,metal, and combinations thereof. DDpp and other compositions may beattached on a support material by a non-covalent association or bycovalent bonding, using reagents and techniques known in the art. In oneembodiment, the DDpp is coupled to a chromatography material using alinker.

As used herein, the terms “pharmaceutically acceptable,” or“physiologically tolerable” and grammatical variations thereof, as theyrefer to compositions, carriers, diluents and reagents, are usedinterchangeably and represent that the materials are capable ofadministration to or upon a human without the production oftherapeutically prohibitive undesirable physiological effects such asnausea, dizziness, gastric upset and the like.

“Modulate,” means adjustment or regulation of amplitude, frequency,degree, or activity. In another related aspect, such modulation may bepositively modulated (e.g., an increase in frequency, degree, oractivity) or negatively modulated (e.g., a decrease in frequency,degree, or activity). In some embodiments, modulation in a positive ornegative direction is referenced as compared to the cell, tissue, ororgan function prior to administration of a therapeutic. In additionalembodiments, modulation in a positive or negative direction isreferenced with respect to a normal, healthy cell, tissue or organ.

An “effective amount” of a DDpp such as a DDpp fusion protein asprovided herein, is an amount sufficient to carry out a specificallystated purpose such as to bring about an observable change in the levelof one or more biological activities related to the target to which theDDpp (e.g., a DDpp fusion protein) binds. In certain embodiments, thechange increases the level of target activity. In other embodiments, thechange decreases the level of target activity. An “effective amount” canbe determined empirically and in a routine manner, in relation to thestated purpose. The term “therapeutically effective amount” refers to anamount of a DDpp such as a DDpp fusion protein, or other therapeuticagent effective to “treat” (e.g., reduce symptoms of) a disease ordisorder in a subject (mammal). The term “therapeutically effectiveamount” also refers to an amount effective, at dosages and for periodsof time necessary, to achieve a desired prophylactic result.

“Patient,” “subject,” “animal” and “mammal” are used interchangeably andrefer to mammals such as human patients and non-human primates, as wellas experimental animals such as rabbits, rats, and mice, and otheranimals. Animals include all vertebrates, e.g., mammals and non-mammals,such as chickens, amphibians, and reptiles. “Mammal” as used hereinrefers to any member of the class Mammalia, including, withoutlimitation, humans and nonhuman primates such as chimpanzees and otherapes and monkey species; farm animals such as cattle, sheep, pigs, goatsand horses; domestic mammals such as dogs and cats; laboratory animalsincluding rodents such as mice, rats and guinea pigs, and the like. In aparticular embodiment, the patient is a human. The term does not denotea particular age or sex. Thus, adult and newborn subjects, as well asembryos and fetuses, whether male or female, are intended to be includedwithin the scope of this term.

The terms “treat,” “treatment,” and “treating,” as used herein refer toboth therapeutic treatment and prophylactic or preventative measures,wherein the object is to prevent or slow down (lessen or delay) thesymptoms, complications, or biochemical indicia of a disease, condition,or disorder, alleviating the symptoms or arresting or inhibiting furtherdevelopment of the disease, condition, or disorder. Treatment can beprophylactic (to prevent or delay the onset of the disease, or toprevent the manifestation of clinical or subclinical symptoms thereof)or therapeutic suppression or alleviation of symptoms after themanifestation of the disease, condition, or disorder targeted pathologiccondition, prevent the pathologic condition, pursue or obtain beneficialresults, or lower the chances of the individual developing the conditioneven if the treatment is ultimately unsuccessful. Those in need oftreatment include those already with the condition as well as thoseprone to have the condition or those in whom the condition is to beprevented. Treatment can be with a DDpp fusion protein alone or incombination with an additional therapeutic agent.

“Cancer,” “tumor,” or “malignancy” are used as synonymous terms andrefer to any of a number of diseases that are characterized byuncontrolled, abnormal proliferation of cells, the ability of affectedcells to spread locally or through the bloodstream and lymphatic systemto other parts of the body (metastasize) as well as any of a number ofcharacteristic structural and/or molecular features. “Tumor,” as usedherein refers to all neoplastic cell growth and proliferation, whethermalignant or benign, and all pre-cancerous and cancerous cells andtissues. A “cancerous tumor,” or “malignant cell” is understood as acell having specific structural properties, lacking differentiation andbeing capable of invasion and metastasis. Cancers that can be treatedusing DDpp fusion proteins provided herein include hematological tumors,such as leukemias and lymphomas, or solid tumors. In particularembodiments, the cancer to be treated is a leukemia or a lymphoma. Typesof cancers to be treated with the DBDpp include, but are not limited to,carcinoma, blastoma, and sarcoma, and certain leukemia or lymphoidmalignancies, benign and malignant tumors, and malignancies e.g.,sarcomas, carcinomas, and melanomas. Types of cancer and tumors that maybe treated using DDpp-include without limitation, breast, lung, brain,bone, liver, kidney, colon, head and neck, ovarian, hematopoietic (e.g.,leukemia), and prostate cancer. In some embodiments, the cancer andtumors that may be treated using DDpp-include breast and ovarian cancer.Other types of cancer and tumors that may be treated usingDDpp-containing antibodies are described herein or otherwise known inthe art.

The terms tumor antigen or cancer antigen are used interchangeablyherein. Tumor and cancer antigens may be tumor-specific antigen (TSA),cancer-specific antigens (CSA) tumor-associated antigen (TAA) orcancer-associated antigens (CAA). A TSA is an antigen that is unique totumor cells and does not occur on other cells in the body. A TAA is anantigen that is found on both tumor and some normal cells. Because ofthe dynamic nature of tumors, in some instances, tumor cells may expressunique antigens at certain stages, and at others also express antigensthat are also expressed on non-tumor cells. Thus, inclusion of a certainmarker as a TAA does not preclude it being considered a TSA.

The term “target cell” as used herein refers to a cell or cells whichare involved in a disease and can be targeted by DDpp containingcompositions. Other target cells include any cell in a subject (e.g., ahuman or animal) that can be targeted by disclosed DDpp. The target cellcan be a cell expressing or overexpressing a target specifically boundby a DDpp fusion protein.

The term “effector cells” as used herein refers to leukocytes whichexpress one or more FcRs and perform effector functions. Preferably, thecells express at least Fc(RIII and perform ADCC effector function.Examples of human leukocytes which mediate ADCC include peripheral bloodmononuclear cells (PBMC), natural killer (NK) cells, monocytes,cytotoxic T cells and neutrophils; with PBMCs and NK cells beingpreferred in certain embodiments. The effector cells can be isolatedfrom native source thereof, e.g., from blood or PBMCs as describedherein or otherwise known in the art. In a specific embodiment, theeffector cells are human effector cells.

The term “effector function” refers to the specialized immune functionof a differentiated cell. Effector function of a T cell, for example,may be cytolytic activity or helper activity including the secretion ofcytokines.

The term “immune cell” as used herein refers to the cells of themammalian immune system including but not limited to antigen presentingcells, B cells, basophils, cytotoxic T cells, dendritic cells,eosinophils, granulocytes, helper T cells, leukocytes, lymphocytes,macrophages, mast cells, memory cells, monocytes, natural killer cells,neutrophils, phagocytes, plasma cells and T cells.

The terms “T cell” and “T lymphocyte” are interchangeable and usedsynonymously herein. Examples include but are not limited to naive Tcells, central memory T cells, effector memory T cells or combinationsthereof.

The term “immune response” as used herein refers to immunities includingbut not limited to innate immunity, humoral immunity, cellular immunity,immunity, inflammatory response, acquired (adaptive) immunity,autoimmunity and/or overactive immunity.

The term “transduction” as used herein refers to the introduction of aforeign nucleic acid into a cell using a viral vector. “Transfection” asused herein refers to the introduction of a foreign nucleic acid into acell using recombinant DNA technology. The term “transformation” meansthe introduction of a “foreign” (e.g., extrinsic, extracellular, orotherwise non-endogenous) nucleic acid (DNA or RNA) sequence to a hostcell, so that the host cell will express the introduced nucleic acid toproduce a desired substance, such as a protein or enzyme coded by theintroduced coding sequence. The introduced nucleic acid sequence canalso be called a “cloned” or “foreign” gene or sequence, can includeregulatory or control sequences, such as start, stop, promoter, signal,secretion, or other sequences used by a cell's genetic machinery. Thenucleic acid sequence can include nonfunctional sequences or sequenceswith no known function. A host cell that receives and expressesintroduced nucleic acid (e.g., DNA or RNA) has been “transformed” and isa “transformant” or a “clone.” The DNA or RNA introduced to a host cellcan come from any source, including cells of the same genus or speciesas the host cell, or cells of a different genus or species or may benon-naturally occurring.

“Cell surface receptor” refers to molecules and complexes of moleculescapable of receiving a signal and the transmission of such a signalacross the plasma membrane of a cell. An example of a cell surfacereceptor provided herein is an activated integrin receptor, for example,an activated αvβ3 integrin receptor on a metastatic cell. As usedherein, “cell surface receptor” also includes a molecule expressed on acell surface that contains a DDpp capable of binding a target ofinterest (e.g., BCMA, CD123, CS1, HER2, AFP, or AFP p26). The term“receptor” denotes a cell-associated protein that binds to, or otherwiseinteracts with, a molecule (e.g., a ligand) and mediates the effect ofthe ligand on the cell. In some embodiment, the molecule that interactswith a receptor is a bioactive molecule. Membrane-bound cell-surfacereceptors are typically characterized by a multi-domain structurecomprising an extracellular ligand-binding domain, a membrane spanningdomain, and an intracellular effector domain that is typically involvedin signal transduction.

The term “CS1” as used herein refers to an NK cell receptor regulatingimmune functions that is also expressed on B cells, T cells, dendriticcells, NK-T cells, and monocytes. CS1 is overexpressed in multiplemyeloma and has been successfully targeted for immunotherapy multiplemyeloma. Malaer & Mathew, Am J Cancer Res. 7(8): 1637-1641 (2017). CS1is also known as SLAM7, protein 19A, CRACC, and CD319. The term “CS1”includes variants, isoforms, homologues, orthologs and paralogs. CS1 isa transmembrane protein with various differentially spliced isoforms. Insome embodiments, the amino acid sequence of human CS1, comprising a 22amino acid residue N-terminal signal sequence (MAGSPTCLTLIYILWQLTGSAA,SEQ ID NO: 964) and an extracellular domain comprising the 226N-terminal residues (SEQ ID NO: 965), has Genbank Accession No.NP_067004 (SEQ ID NO: 966). In some embodiments, the amino acid sequenceof human CS1 has Genbank Accession No. NP_001269517, NP_001269518,NP_001269519, NP_001269520, NP_001269521, NP_001269522, NP_001269523,NP_001269524, or NP_001269525.

“Chimeric antigen receptor” or “CAR” or “CARs” as used herein refers toan engineered receptor, which grafts an antigen or target specificityonto a cell (for example T cells such as naive T cells, central memory Tcells, effector memory T cells, NK cells, NKT cells or combinationthereof). CARs are also known as artificial T cell receptors, chimeric Tcell receptors or chimeric immunoreceptors.

D Domain Polypeptides (DDpp)

Unless otherwise indicated, the practice of the disclosed compositionsand methods employs standard techniques of molecular biology (includingrecombinant techniques, tissue culture, and cell transformation),microbiology, cell biology, biochemistry and immunology, which arewithin the skill of the art. Such techniques are typically performedaccording to the manufacturer's specifications or as commonlyaccomplished using or routinely modifying known procedures such as,those set forth in Sambrook et al. (Molecular Cloning: A LaboratoryManual. Cold Spring Harbor Laboratory Press, Cold Spring Harbor, N.Y.(1989)); PCR Technology: Principles and Applications for DNAAmplification (ed. H. A. Erlich, Freeman Press, NY, N.Y., 1992);Oligonucleotide Synthesis (Gait, ed., 1984); Animal Cell Culture(Freshney, ed., 1987); Handbook of Experimental Immunology (Weir et al.,eds.; Gene Transfer Vectors for Mammalian Cells (Miller, ed., 1987);Current Protocols in Molecular Biology (Ausubel., ed., 1987); PCRProtocols: A Guide to Methods and Applications (Innis, ed., AcademicPress, San Diego, Calif., 1990); Mattila, et al., Nucleic Acids Res. 19:967 (1991); Eckert, et al., PCR Methods and Applications 1: 17 (1991);PCR (McPherson, ed., IRL Press, Oxford); PCR: The Polymerase ChainReaction, (Mullis, ed., 1994); Harlow, Antibodies: A Laboratory Manual,(Cold Spring Harbor Laboratory Press, 2nd ed. 1988) and Kontermann, ed.,“The Antibody Engineering Lab Manual” (Springer Verlag, Heidelberg/NewYork, 2000); Current Protocols in Immunology (Coligan, ed., 1991); TheImmunoassay Handbook (Wild, ed., Stockton Press NY, 1994); and Methodsof Immunological Analysis (Masseyeff., ed., Weinheim: VCH Verlagsgesellschaft mbH, 1993); and Gennaro, et al. 2000, Remington: theScience and Practice of Pharmacy, 20th Ed. Lipincott Williams andWilkins: Baltimore, Md., or as described herein. Unless specificdefinitions are provided, the nomenclature utilized in connection with,and the laboratory procedures and techniques of analytical chemistry,synthetic organic chemistry, and medicinal and pharmaceutical chemistrydescribed herein, are those known and used in the art. Additionally,standard techniques can be used for chemical syntheses, chemicalanalyses, recombinant production, purification, pharmaceuticalpreparation, formulation, delivery, and treatment of patients.

According to various embodiments, the disclosure provides a DDpp thatspecifically binds a target of interest selected from the groupconsisting of BCMA, CD123, CS1, HER2, AFP, and AFP p26. In someembodiments, a DD of the DDpp comprises an amino acid sequence selectedfrom the group consisting of SEQ ID NO: 11-949, and 950. In someembodiments, the DDpp comprises a D Domain (DD) selected from the groupconsisting of: (a) a DD that specifically binds BCMA and comprises theamino acid sequence of SEQ ID NO: 11-305, or 306; (b) a DD thatspecifically binds CD123 and comprises the amino acid sequence of SEQ IDNO: 307-739, or 740; (c) a DD that specifically binds AFP or a fragmentthereof, and comprises the amino acid sequence of SEQ ID NO: 741-874, or886-895; (d) a DD that specifically binds AFP p26 and comprises theamino acid sequence of SEQ ID NO: 741-874, or 886-895, (e) a DD thatspecifically binds CSI (SEQ ID NO: 965) or a fragment thereof, andcomprises the amino acid sequence of SEQ ID NO: 896-909, or 910, (f) aDD that specifically binds HER2 or a fragment thereof, and comprises theamino acid sequence of SEQ ID NO: 911-949, or 950. Proteins comprisingvariants of (a)-(f) that retain the ability to specifically bind theirrespective targets are also provided.

In additional embodiments, a DD of the DDpp is a variant of a DDreference sequence selected from the group consisting of SEQ ID NO:11-949, and 950, that retains the ability to specifically bind thetarget of the reference DD. In some embodiments, the sequence of thevariant DD comprises the amino acid sequence of a variant that has atleast 75%, 80%, 85%, 87%, 89%, 90%, 92%, 94%, 96% or 98% sequenceidentity to a reference DD sequence selected from the group consistingof SEQ ID NO: 11-949, and 950, and the variant DD retains the ability tospecifically bind the target of the reference DD sequence.

In some embodiments, a DD of the DDpp is a variant of a BCMA-binding DDreference sequence selected from the group consisting of SEQ ID NO:11-305, and 306, that retains the ability to specifically bind BCMA. Insome embodiments, the sequence of the variant DD comprises the aminoacid sequence of a variant that has at least 75%, 80%, 85%, 87%, 89%,90%, 92%, 94%, 96% or 98% sequence identity to a reference DD sequenceselected from the group consisting of SEQ ID NO: 11-305, and 306, andthe variant DD retains the ability to specifically bind BCMA.

In some embodiments, a DD of the DDpp is a variant of a CD123-binding DDreference sequence selected from the group consisting of SEQ ID NO:307-739, and 740, that retains the ability to specifically bind CD123.In some embodiments, the sequence of the variant DD comprises the aminoacid sequence of a variant that has at least 75%, 80%, 85%, 87%, 89%,90%, 92%, 94%, 96% or 98% sequence identity to a reference DD sequenceselected from the group consisting of SEQ ID NO: 307-739, and 740, andthe variant DD retains the ability to specifically bind CD123.

In some embodiments, a DD of the DDpp is a variant of a CS1-binding DDreference sequence selected from the group consisting of SEQ ID NO:896-909, and 910, that retains the ability to specifically bind CS1. Insome embodiments, the sequence of the variant DD comprises the aminoacid sequence of a variant that has at least 75%, 80%, 85%, 87%, 89%,90%, 92%, 94%, 96% or 98% sequence identity to a reference DD sequenceselected from the group consisting of SEQ ID NO: 896-909, and 910, andthe variant DD retains the ability to specifically bind CS1.

In some embodiments, a DD of the DDpp is a variant of a HER2-binding DDreference sequence selected from the group consisting of SEQ ID NO:911-949, and 950, that retains the ability to specifically bind HER2. Insome embodiments, the sequence of the variant DD comprises the aminoacid sequence of a variant that has at least 75%, 80%, 85%, 87%, 89%,90%, 92%, 94%, 96% or 98% sequence identity to a reference DD sequenceselected from the group consisting of SEQ ID NO: 911-949, and 950, andthe variant DD retains the ability to specifically bind HER2.

In some embodiments, a DD of the DDpp is a variant of a AFP-binding DDreference sequence selected from the group consisting of SEQ ID NO:741-874, and 886-895, that retains the ability to specifically bind AFP.In some embodiments, the sequence of the variant DD comprises the aminoacid sequence of a variant that has at least 75%, 80%, 85%, 87%, 89%,90%, 92%, 94%, 96% or 98% sequence identity to a reference DD sequenceselected from the group consisting of SEQ ID NO: 741-874, and 886-895,and the variant DD retains the ability to specifically bind AFP.

In some embodiments, a DD of the DDpp is a variant of a AFP p26-bindingDD reference sequence selected from the group consisting of SEQ ID NO:741-874, or 886-895, that retains the ability to specifically bind AFPp26. In some embodiments, the sequence of the variant DD comprises theamino acid sequence of a variant that has at least 75%, 80%, 85%, 87%,89%, 90%, 92%, 94%, 96% or 98% sequence identity to a reference DDsequence selected from the group consisting of SEQ ID NO: 741-874, or886-895, and the variant DD retains the ability to specifically bind AFPp26.

In particular embodiments, the identity between a variant DD (query)sequence and a reference DD sequence, also referred to as a globalsequence alignment, is determined using the FASTDB computer programbased on the algorithm of Brutlag et al. Comp. App. Biosci. 6: 237-245(1990). Preferred parameters used in a FASTDB amino acid alignment are:Matrix=PAM 0, k-tuple=2, Mismatch Penalty=1, Joining Penalty=20,Randomization Group Length=0, Cutoff Score=1, Window Size=sequencelength, Gap Penalty=5, Gap Size Penalty=0.05, Window Size=500 or thelength of the subject amino acid sequence, whichever is shorter.According to this embodiment, if the reference DD sequence is shorterthan the variant DD query sequence due to N- or C-terminal deletions,not because of internal deletions, a manual correction is made to theresults to take into consideration the fact that the FASTDB program doesnot account for N- and C-terminal truncations of the reference DDsequence when calculating global percent identity. For referencesequences truncated at the N- and C-termini, relative to the querysequence, the percent identity is corrected by calculating the number ofresidues of the query sequence that are N- and C-terminal of thereference sequence, which are not matched/aligned with a correspondingsubject residue, as a percent of the total bases of the query sequence.A determination of whether a residue is matched/aligned is determined byresults of the FASTDB sequence alignment. This percentage is thensubtracted from the percent identity, calculated by the above FASTDBprogram using the specified parameters, to arrive at a final percentidentity score. This final percent identity score is what is used forthe purposes of this embodiment.

In some embodiments, the DDpp contains a variant DD containing an aminoacid sequence that differs from a corresponding reference DD of SEQ IDNO: 11-949, or 950, in two or more categories of sequence modifications(i.e., substitutions, deletions, insertions, and additions), and thevariant DD retains the ability to bind the target of the respectivereference DD (e.g., BCMA, CD123, CS1, HER2, AFP, and AFP p26). Forexample, the sequence of the variant DD may include combinations ofamino acid deletions, insertions and substitutions compared to thesequence of the reference DD. In some embodiments, the sequence of thevariant DD contains 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more than 10,amino acid substitutions compared to a reference DD sequence of SEQ IDNO: 11-949, or 950. In some embodiments, the sequence of the variant DDcontains 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more than 10, conservativeamino acid substitutions compared to a reference DD sequence of SEQ IDNO: 11-949, or 950. In some embodiments, the sequence of the variant DDcontains 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more than 10, nonconservativeamino acid substitutions compared to a reference DD sequence of SEQ IDNO: 11-949, or 950. In some embodiments, the sequence of the variant DDcontains 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more than 10, conservativeand nonconservative amino acid substitutions compared to a reference DDsequence of SEQ ID NO: 11-949, or 950. In some embodiments, the sequenceof the variant DD contains 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more than10, amino acid deletions compared to a reference DD sequence of SEQ IDNO: 11-949, or 950. In some embodiments, the sequence of the variant DDcontains 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more than 10, amino acidinsertions in a reference DD sequence of SEQ ID NO: 11-949, or 950 andthe variant DD retains the ability to bind the target of the referenceDD. Additionally provided are DDpp comprising a variant DD in whichamino acid residues have been deleted from the amino terminus, thecarboxy terminus, or both the amino and carboxy termini of acorresponding reference DD of SEQ ID NO: 866, and 867 In someembodiments, the sequence of the variant DD contains a sequence with 1,2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12, amino acid residues deleted fromthe amino terminus of a reference DD sequence of SEQ ID NO: 11-949, or950 and the variant DD retains the ability to bind the target of thereference DD. In some embodiments, the sequence of the variant DDcontains a sequence with 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12, aminoacid residues deleted from the carboxy terminus of a reference DD of SEQID NO: 11-949, or 950 and the variant DD retains the ability to bind thetarget of the reference DD. In some embodiments, the sequence of thevariant DD sequence contains 1-5, 1-10, or 1 to 15, amino acid residuesdeleted from the amino terminus of a reference DD sequence of SEQ ID NO:11-949, or 950, the variant DD sequence has 1-5, 1-10, or 1 to 15, aminoacid residues deleted from the carboxy terminus of the reference DDsequence, and the variant DD retains the ability to bind the target ofthe reference DD.

DDpp Fusion Proteins

A “fusion protein,” “chimeric polypeptide,” “chimeric protein,”“chimeric antigen,” and a DDpp that comprises/contains a heterologouspolypeptide, is a polypeptide comprised of at least two polypeptides andoptionally a linker to operatively link the two polypeptides into onecontinuous polypeptide produced, e.g., by recombinant processes. The twopolypeptides may be operably attached directly or indirectly.

A “DDpp fusion protein” provided herein comprises at least one DDppdisclosed herein that specifically binds a target of interest (e.g.,BCMA (SEQ ID NO: 7), CD123 (SEQ ID NO: 8), CS1 (SEQ ID NO: 965), HER2(SEQ ID NO: 967), AFP (SEQ ID NO: 9), AFP p26 (SEQ ID NO: 10), or afragment thereof). In one embodiment, the DDpp fusion protein containsone DDpp.

In some embodiments, the DDpp fusion protein is a soluble proteincomprising one or more target-binding DDpp and a p26 protein (e.g.,having the sequence of SEQ ID NO: 10, 968, 969, 970, 971, 972, 973, or974). Such fusion proteins containing p26 sequences have been discoveredherein to have surprisingly long serum half-life. In some embodiments,the soluble DDpp fusion protein has a plasma half-life in vivo of atleast 1 hour, at least 2 hours, at least 4 hours, at least 8 hours, atleast 16 hours, at least 32 hours, at least 64 hours, or more. In someembodiments, the soluble fusion protein has an in vivo plasma half-lifeof at least 1 hour, at least 2 hours, at least 4 hours, at least 8hours, at least 16 hours, at least 32 hours, at least 64 hours, or morehours 65 hours, or 1-10 hours, 2-10 hours, 4-10 hours, 6-10 hours, or6-9 hours in a mouse. In some embodiments, the soluble DDpp fusionprotein has an in vivo plasma half-life of at least 1 hour, at least 2hours, at least 4 hours, at least 8 hours, at least 16 hours, at least32 hours, at least 64 hours, or more hours 65 hours, or 1-10 hours, 2-10hours, 4-10 hours, 6-10 hours, or 6-9 hours, in a human.

In some embodiments, the disclosure provides a method for modifying thein vivo half-life (e.g., in a mouse or human) of a soluble fusionprotein comprising a p26 protein (e.g., having the sequence of SEQ IDNO: 10, 968, 969, 970, 971, 972, 973, or 974). In some embodiments, thesoluble p26 fusion protein comprises one or more target-binding DDpp. Insome embodiments, the half-life of the p26 soluble fusion protein isincreased or decreased by substituting or deleting one or more aminoacid residues normally found in the human p26 protein, or by insertingone or more amino acid residues not normally found in the human p26protein. In another embodiment, the p26 sequence of the soluble fusionprotein is modified through 1, 2, 3, 5, 5, 10, or 1-20, 1-10, 3-10, or3-5, amino acid substitutions (conservative and/or nonconservativesubstitutions), deletions, and/or insertions so as to increase ordecrease the in vivo half-life of the soluble fusion protein. In aparticular embodiment, the amino acid residue corresponding to theglutamine (Gln, Q) at position 217 of SEQ ID NO: 10 of p26 issubstituted with another amino acid residues. In a further embodimentthe substitution is Gln217Pro. In another embodiment, the p26 sequenceof the soluble fusion protein is modified through deletion of 1-150,1-100, 1-50, 1-25 or 1-10 amino acid residues so as to increase ordecrease the in vivo half-life of the soluble fusion protein. Inadditional embodiments, the p26 sequence of the soluble fusion proteinis modified through 1, 2, 3, 5, 5, 10 or 1-20, 1-10, 3-10, or 3-5, aminoacid substitutions (conservative and/or nonconservative substitutions),deletions, and/or insertions so as to increase or decrease theinteraction of the soluble fusion protein with FcRn.

Multimeric DDpp Fusion Proteins

In one embodiment, the DDpp fusion protein comprises more than one DDpp,wherein two or more DDpp have the same or different specificities. Inadditional embodiments, the DDpp fusion protein comprises a tandemrepeat of the same or different DD that allow a DDpp fusion protein tobind multiple targets and/or repeating epitopes or different epitopes onthe same target. In some embodiments, the DDpp fusion protein comprisesat least 2, 3, 4, or 5, or more than 5, DDpp. In some embodiments, theDDpp fusion protein contains 1-3, 1-4, 1-5, or more than 5, differentDDpp. In some embodiments, the DDpp fusion protein contains at least 2,3, 4, or 5, or more than 5, different DDpp. Thus, a DDpp fusion proteincan be a monomeric DDpp (i.e., containing one DDpp) or multimeric DDpp(i.e., containing more than one DDpp in tandem optionally operablyconnected by a linker). In some embodiments, the use of multimeric DDppprovides enhanced (e.g., synergistic) target binding. In additionalembodiments, multimeric DDpp allows targeting of more than one targetusing a single DDpp construct (e.g., bi-, tri-specific, etc.). Thelinkage of two or more identical DDpp results in a multivalent moleculethat provides distinct advantages (e.g., increased binding avidity,target clustering and receptor activation) over monovalent compositions.The linkage of two or more different DDpp results in a multivalent andmulti-specific molecule that has the potential to bind more than onetarget antigen, either independently or simultaneously.

The multimeric DDpp fusion protein can be a DDpp homo-multimeric (i.e.,containing more than one of the same DDpp in tandem optionally connectedby linker(s) (e.g., homodimers, homotrimers, homotetramers etc.) or DDpphetero-multimeric (i.e., containing two or more DDpp in which there areat least two different DDpp protein. The number of monomeric DDppincluded within a multimeric composition may vary, depending on theembodiment, and may be defined, at least in part, by the expressionsystem in which the DDpp is produced. In some embodiments, however, thefusion proteins may comprises multimers of about 5 to about 10 DDppsubunits, about 10 to about 15 subunits, about 15 to about 20 subunits,about 20 to about 25 subunits, or about 25 to about 30 subunits(including numbers in between those listed as well as endpoints).Moreover, multiple tandem components of a DDpp fusion protein cancontain the same or different DDpp. In some DDpp fusions, the DDpp arepresent as a monomer, or in homomultimers or heteromers such as,homodimers or heterodimers, homotrimers or heterotrimers, homotetramersor heterotetramers.

A DDpp fusion protein can be “monospecific” or “multi-specific.” A DDppfusion protein that is “multi-specific” (e.g., bispecific, trispecificor of greater multi-specificity) recognizes and binds to two or moredifferent epitopes present on one or more different molecules (e.g.,proteins, solid support structures, etc.).

In some embodiments, two or more DDs are fused together as a multivalentDDpp. The DD of the multivalent DDpp may be the same or different. Thus,the disclosure provides a DDpp homo-dimer (i.e., a DDpp comprising twoidentical DD), a DDpp homo-multimer (i.e., a DDpp comprising three ormore identical DD), a DDpp hetero-dimer (i.e., a DDpp comprising twodifferent DD), and DDpp hetero-multimer (i.e., a DDpp comprising threeor more DD, wherein at least two of the DD are different) comprising anyof the DD described herein, optionally attached by one or more linkers.

In some embodiments, two or more DDs are linked by a multimerizationdomain or attached via chemical linkage, to generate a multivalent DDcomplex. The DD of the multivalent DD complex may be the same ordifferent. Thus, the disclosure provides a DD homo-dimer complex (i.e.,a DD complex comprising two identical DD), a DD homo-multimer complex(i.e., a DD complex comprising three or more identical DD), a DDhetero-dimer complex (i.e., a DD complex comprising two different DD),and DD hetero-multimer complex (i.e., a DD complex comprising three ormore DD, wherein at least two of the DD are different) comprising any ofthe DD described herein, optionally attached by one or more linkers.

In one embodiment, a multi-specific DDpp fusion protein contains atleast two DDpp that bind to at least two different epitopes on a singletarget of interest (e.g., BCMA, CD123, CS1, HER2, AFP, or AFP p26). In afurther embodiment, the DDpp fusion is bispecific and specifically bindsto two different targets expressed on the surface of two different celltypes. In one embodiment the bispecific DDpp fusion protein specificallybinds to a target on a cancer cell and a target on an immune effectorcell. In one embodiment the bispecific DDpp fusion protein specificallybinds a target expressed on a cancer cell (e.g., BCMA, CS1, CD123, andCD19) and a target expressed on the surface of a T lymphocyte (e.g.,CD3). In one embodiment the bispecific DDpp fusion protein specificallybinds BCMA and CS1.

In additional embodiments, a multi-specific DDpp fusion proteincomprises at least one DDpp that specifically binds one epitope on atarget of interest and at least one other domain or sequence conferringfunction (e.g., an antibody fragment or domain such as an scFv) thatspecifically binds to a different epitope on the same target ofinterest. In one embodiment, a multi-specific DDpp fusion proteincomprises at least one DDpp that specifically binds to an epitope on atarget of interest and at least one domain or sequence conferringfunction e.g., an antibody fragment or domain (e.g., scFv), thatspecifically binds to an epitope on a different target of interest. Inone embodiment, the multi-specific DDpp fusion protein comprises atleast one DDpp that specifically binds to an epitope on a target ofinterest and at least one domain or sequence that specifically binds toan epitope on a different target on the same cell. In other embodiments,a DDpp fusion protein comprises at least one DDpp and at least one otherDDpp or domain sequence conferring function, e.g., an antibody fragmentor domain that specifically binds to a solid support.

In a further embodiment, the multimeric DDpp fusion comprising 2 or moreDDpp are in turn fused with other heterologous proteins (or theirsubdomains) and in so doing, impart the multivalent and multi-specificproperties to the fusion partner. Examples of fusion partners of a DDppinclude but are not limited to, antibodies, antibody subdomains (e.g.,scFv or Fc domains), serum albumin, serum albumin subdomains, cellsurface receptors, an alpha chain of a T cell receptor (TCR), a betachain of a T cell receptor, cell surface receptor subdomains, peptides,peptide tags (e.g., FLAG or myc), fibronectin type III repeats,z-domains, elastin-like polypeptides. The number and location of DDppand their respective positions within the fusion protein can vary. Forexample, DDpp(s) can be located at one or all termini of a fusionpartner and/or interspersed within heterologous subunits within the DDppfusion partner.

In additional embodiments, a DDpp fusion protein comprises a DDpp and apolypeptide sequence containing an additional domain. In someembodiments, the DDpp fusion protein comprises a DDpp and a memberselected from: an antibody, an antibody fragment (e.g., an antigenbinding domain or portion thereof (e.g., an scFv), an effector domain orportion thereof, an FcRn binding domain or portion thereof, and an Fc ora portion thereof), a serum protein (e.g., albumin or a portionthereof), a cytokine, a growth factor, a hormone, an imaging agent, alabeling agent, and a peptide tag. In some embodiments, the DDpp fusionprotein comprises an Fc domain of an immunoglobulin (e.g., a human Fcdomain) or a portion thereof. In further embodiments, the Fc domain is avariant human Fc domain.

In some embodiments, the DDpp is fused to a heterologous polypeptide. Insome embodiments, the heterologous polypeptide comprises a full-lengthantibody or an antibody fragment. In some embodiments, the DD is fusedto: the amino terminus of a full-length antibody heavy chain; the aminoterminus of a full-length antibody light chain; the carboxyl terminus ofa full-length antibody heavy chain; or the carboxyl terminus of afull-length antibody light chain. In other embodiments, the DD is fusedto an antibody fragment which is an Fc. In additional embodiments, theheterologous polypeptide comprises a member selected from the groupconsisting of: (i) a transmembrane domain; (ii) a membrane associatingdomain; (iii) human serum albumin or a fragment thereof; (iv) AFP or afragment thereof; (v) AFP p26 or a fragment thereof; (vi) theextracellular domain of a receptor or a fragment thereof; and (vii) theextracellular domain of an intracellular receptor (e.g., a nuclearprotein) or a fragment thereof. In some embodiments, the DDpp contains aheterologous polypeptide comprising the extracellular domain, or afragment of an extracellular domain, of a cell surface receptor.

In some embodiments, the DDpp of a DDpp fusion protein is incorporatedinto a larger, multi-domain molecular complex (e.g., a monomeric ormultimeric DDpp fusion protein) and in so doing, imparts the functionalattributes of the incorporated DDpp to the resultant fusion protein. Insome embodiments, the DDpp fusion protein comprises a DDpp and apolypeptide sequence from an antibody, an antibody fragment, a serumprotein (e.g., human serum albumin) or serum protein fragment, or a cellsurface receptor, an alpha chain of a T cell receptor (TCR), a betachain of a T cell receptor, cytokine, growth factor, hormone, or enzyme,or fragment thereof. Incorporation of DD into multidomain and/ormultifunctional complexes can routinely be achieved by way ofrecombinant fusion to another polypeptide, binding to another chemicalmoiety, and covalent chemical linkage to another polypeptide (or otherdesirable chemical compound) using techniques known in the art. DDppfusion proteins can additionally contain other optional components suchas linkers and other components described herein.

DDpp Fusion Proteins as CARs

In addition to the incorporation of DD into soluble multi-domainproteins, the present invention provides a means by which to createcell-associated DDpp, comprised of at least one DDpp designed to impartbinding specificity a membrane bound fusion protein. DDpp-receptors maybe expressed by any cell type.

In one embodiment, the DDpp-receptor fusion protein comprises a chimericantigen receptor (CAR), or DDpp-CAR, that comprises: an extracellulartargeting domain and a transmembrane domain. In another embodiment, theDDpp-CAR is composed of an extracellular targeting domain, atransmembrane domain, and a cytoplasmic domain wherein the cytoplasmicdomain comprises the signaling domain. In a further embodiment theDDpp-CAR extracellular domain comprises one or more DDpp, in which eachDDpp constitutes a specific binding domain with the same or differentspecificities. In some embodiments, the target-specific domain isdirected to one (or more) of the cancer or tumor antigens disclosedherein, such as BCMA, CD123, CS1, HER2, AFP, and AFP p26, asnon-limiting examples. In one embodiment, the intracellular domain(e.g., the cytoplasmic domain) of the DDpp-CAR comprises theintracellular domain of CD3 zeta chain. In another embodiment theintracellular signaling domain of the DDpp is comprised of part of theintracellular domain of CD3 zeta chain. In a further embodiment, theintracellular domain of the DDpp-CAR comprises the intracellular domainof CD3 zeta chain and a costimulatory signaling region. Thecostimulatory signaling region refers to a portion of the DDpp-CARcomprising all or part of the intracellular domain of a costimulatorymolecule. Costimulatory molecules are cell surface molecules other thanantigens receptors or their ligands that are required for an efficientresponse of lymphocytes to antigen. Costimulatory molecules and portionsof these molecules that are able to confer costimulatory properties toan AR are known in the art and can routinely be incorporated into theDDpp-CAR. In addition, truncations or mutation to these intracellularsignaling and costimulatory domains may be incorporated to furtherenhance or reduce receptor signaling. In preferred embodiments, a T cellis genetically modified to stably express a DDpp-CAR. In suchembodiments, the cytoplasmic domain of the DDpp-CAR can be designed tocomprise the CD28 and/or 41BB signaling domain by itself or be combinedwith any other desired cytoplasmic domain(s) useful in the context ofthe disclosed embodiments. In one embodiment, the cytoplasmic domain ofthe DDpp-CAR can be designed to further comprise the signaling domain ofCD3-zeta. In one embodiment, the DDpp-CAR comprises an extracellulartargeting domain, an extracellular protein linker with a transmembranedomain that passes through the cellular membrane (such as found in Tcells or NK cells), and a cytoplasmic domain, optionally comprisingmultiple signaling modules. In some embodiments, the DDpp-CAR may alsocomprise an epitope tag. In some embodiments, the cytoplasmic domain ofthe DDpp-CAR can include but is not limited to CD3-zeta, 41BB and CD28signaling modules and combinations thereof.

In additional embodiments, the disclosure provides a chimeric antigenreceptor (CAR), wherein the CAR includes a targeting domain comprising aDDpp disclosed herein, a transmembrane domain, and an intracellularsignaling domain. In some embodiments, the intracellular signalingdomain is selected from the group consisting of a human CD3 zeta domain,41BB domain, a CD28 domain and/or any combination thereof. Depending onthe embodiment, the costimulatory signaling region can comprise, forexample, the intracellular domain of a costimulatory molecule selectedfrom the group consisting of CD27, CD28, 41BB, OX40, CD30, CD40, PD1,lymphocyte function-associated antigen-1 (LFA 1), CD2, CD7, LIGHT,NKG2C, B7H3, a ligand that specifically binds with CD83, and anycombination thereof. In some embodiments, the targeting domain of theCAR comprises a plurality of binding domains (e.g., DDs, or one or moreDD and a scFv) that includes an additional target-binding polypeptide.Nucleic acids encoding CARs that include the target-binding polypeptidesas part (or all) of the targeting region are also provided.

The disclosure also provides cells comprising a nucleic acid sequenceencoding a CAR, wherein the CAR comprises an antigen binding domain madeup of, at least in part, a disclosed DDpp that binds a target ofinterest (e.g., BCMA, CD123, CS1, HER2, AFP, and AFP p26), atransmembrane domain, and a signaling domain. In some embodiments, theCAR binds specifically to a tumor antigen (and thus functions to deliverthe cell expressing the CAR to the tumor. In some embodiments, the tumorantigen is associated with a hematologic malignancy. In someembodiments, the tumor antigen is BCMA. In some embodiments, the tumorantigen is CD123. In some embodiments, the tumor antigen is CS1. Inadditional embodiments, tumor antigen is associated with a solid tumor.In some embodiments, the tumor antigen is HER2. In some embodiments,both solid and hematologic tumors are targeted. In some embodiments, thecell expressing the CAR is a T cell, a natural killer (NK) cell or otherimmune cell type. In some embodiments, the cell expressing the CAR(whether T cell, NK cell or other cell type) exhibits an anti-tumorimmunity when the polypeptide binds to its corresponding tumor antigen.

Extracellular Domain

Depending on the desired antigen to be targeted, the DDpp-CAR can beengineered to include an antigen binding DDpp that is specific to thedesired antigen target. For example, if BCMA is the desired antigen thatis to be targeted, one or more BCMA-binding DDpp can be incorporatedinto the target specific binding domain of the DDpp-CAR. Moreover, theDDpp-CAR can include more than one DDpp, imparting multispecificity ormultivalency to the DDpp-CAR. In some embodiments, the DDpp-CARcomprises a BCMA-binding DDpp. In some embodiments, the DDpp-CARcomprises a CS1-binding DDpp. In some embodiments, the DDpp-CARcomprises a BCMA-binding DDpp and a CS1-binding DDpp.

The choice of DDpp incorporated into the extracellular domain of theDDpp receptor (e.g., DDpp-CAR) depends upon the identity of the cell orcells to be targeted. For example, a DDpp-CAR may specifically bind tocell surface proteins such as a receptor on the same cell or anothercell. In other embodiments, DDpp-CAR specifically binds to a solublemolecule, such as an immunoglobulin. In other embodiments, the targetsof interest bound by the DDpp-CAR include those associated with viral,bacterial and parasitic infections, diseases and disorders of the immunesystem (e.g., autoimmune disease).

In other embodiments, the DDpp-CAR may be chosen to recognize a ligandthat acts as a cell surface marker on target cells associated with acancer. A DDpp-CAR can in some embodiments, target and bind a tumorantigen (e.g., a TAA or other tumor antigen described herein orotherwise known in the art. Accordingly, provided herein are methods forcreating DDpp-CAR, their use in creating chimeric cells such as, human Tcells and natural killer cells and the use of these chimeric T cells inadoptive immunotherapy.

In the context provided herein, “tumor antigen” refers to antigens thatare common to specific hyperproliferative disorders such as cancer.Tumor antigens that can be specifically bound by a DDpp in a DDpp-CARare disclosed herein. In one embodiment, a DDpp in a DDpp-CARspecifically binds a tumor-specific antigen (TSA) or a tumor-associatedantigen (TAA). A TSA is unique to tumor cells and does not occur onother cells in the body. A TAA associated antigen is not unique to atumor cell and instead is also expressed on a normal cell underconditions that fail to induce a state of immunologic tolerance to theantigen. The expression of the antigen on the tumor may occur underconditions that enable the immune system to respond to the antigen. TAAsmay be antigens that are expressed on normal cells during fetaldevelopment when the immune system is immature and unable to respond orthey may be antigens that are normally present at extremely low levelson normal cells but which are expressed at much higher levels on tumorcells.

In some embodiments, a DDpp in the antigen binding moiety portion of aDDpp-CAR specifically binds BCMA, CS1, HER2, or CD123. In someembodiments, the DDpp specifically binds a BCMA protein having an aminoacid sequence consisting of SEQ ID NO: 7. In further embodiments, theDDpp specifically binds BCMA and comprises an amino acid sequenceselected from the group consisting of SEQ ID NO: 11-305, and 306. Insome embodiments, the DDpp specifically binds a CD123 protein having anamino acid sequence consisting of SEQ ID NO: 8. In further embodiments,the DDpp specifically binds CD123 and comprises an amino acid sequenceselected from the group consisting of SEQ ID NO: 307-739, and 740. Insome embodiments, the DDpp specifically binds a CS1 protein having anamino acid sequence consisting of SEQ ID NO: 965. In furtherembodiments, the DDpp specifically binds CS1 and comprises an amino acidsequence selected from the group consisting of SEQ ID NO: 896-909, and910. In some embodiments, the DDpp specifically binds a CS1 and BCMA. Insome embodiments, the DDpp specifically binds a HER2 protein having anamino acid sequence consisting of SEQ ID NO: 967. In furtherembodiments, the DDpp specifically binds HER2 and comprises an aminoacid sequence selected from the group consisting of SEQ ID NO: 911-949,and 950. In additional embodiments, the antigen binding moiety portionof the DDpp-CAR further binds a target selected from: HVEM, BTLA, DR3,CD19, CD20, and CD22.

In one embodiment, a DDpp in a DDpp-CAR specifically binds a tumorantigen associated with a malignant tumor. In one embodiment, a DDpp ofa DDpp-CAR binds to an antigen selected from: a B cell lymphoma-specificidiotype immunoglobulin; a B cell differentiation antigen such as CD19,CD20 and CD37; TSLPR and IL7R on myeloid cells, and heat shock proteingp96 on multiple myeloma cells.

In some embodiments, a DDpp in the antigen binding moiety portion of aDDpp-CAR specifically binds AFP, AFP p26, or a fragment thereof. In someembodiments, the DDpp specifically binds an AFP protein having an aminoacid sequence consisting of SEQ ID NO: 9, or a fragment thereof. In someembodiments, the DDpp specifically binds an AFP p26 protein having anamino acid sequence consisting of SEQ ID NO: 10, or a fragment thereof.In further embodiments, the DDpp specifically comprises an amino acidsequence selected from the group consisting of SEQ ID NO: 741-874, and886-895. In some embodiments, the antigen binding moiety portion of theDDpp-CAR further binds a tumor antigen. In additional embodiments, theantigen binding moiety portion of the DDpp-CAR further binds a targetselected from: BCMA, CD123, CS1, HER2, HVEM, BTLA, DR3, CD19, CD20, andCD22.

Transmembrane Domain

“Transmembrane domain” (TMD) as used herein refers to the region of acell surface expressed DDpp fusion protein such as a DDpp-CAR, whichcrosses the plasma membrane. In some embodiments, the transmembranedomain of the DDpp-CAR is the transmembrane region of a transmembraneprotein (for example Type I transmembrane proteins), an artificialhydrophobic sequence or a combination thereof. Other transmembranedomains will be apparent to those of skill in the art and may be used inconnection with alternate embodiments provided herein.

The DDpp receptor (e.g., DDpp-CAR) can be designed to contain atransmembrane domain that is fused to the extracellular domain of theDDpp receptor. As described above, the fusion of the extracellular andtransmembrane domains can be accomplished with or without a linker. Inone embodiment, the transmembrane domain that is naturally associatedwith one of the domains in the DDpp-CAR is used. In a specificembodiment, the transmembrane domain in the DDpp-CAR is the CD8transmembrane domain. In some instances, the transmembrane domain of theDDpp-CAR comprises the CD8 hinge domain. In some embodiments, thetransmembrane domain is be selected or modified by amino acidsubstitution to promote or inhibit association with other surfacemembrane proteins.

The transmembrane domain can be derived either from a natural or from asynthetic source. Where the source is natural, the domain can be derivedfrom any membrane-bound or transmembrane protein. Transmembrane regionsof particular use for the purposes herein may be derived from (i.e.,comprise at least the transmembrane region(s) of) a member selected fromthe group: the alpha, beta or zeta chain of the T cell receptor; CD28,CD3 epsilon, CD45, CD4, CD5, CD8, CD9, CD16, CD22, CD33, CD37, CD64,CD80, CD86, CD134, CD137, and CD154. Alternatively the transmembranedomain can be synthetic, in which case the DDpp-CAR transmembrane domainwill comprise predominantly hydrophobic residues such as leucine andvaline. In further embodiments, the transmembrane domain comprises thetriplet of phenylalanine, tryptophan and valine at each end of asynthetic transmembrane domain.

“Extracellular spacer domain” (ESD) as used herein refers to thehydrophilic region which is between the antigen-specific targetingregion and the transmembrane domain. In some embodiments, the DDpp-CARcomprise an extracellular spacer domain. In other embodiments, theDDpp-CAR does not comprise an extracellular spacer domain. Theextracellular spacer domains include but are not limited to Fc fragmentsof antibodies or fragments or derivatives thereof, hinge regions ofantibodies or fragments or derivatives thereof, CH2 regions ofantibodies, CH3 regions of antibodies, artificial spacer sequences orcombinations thereof. Additional examples of extracellular spacerdomains include but are not limited to CD8a hinge, and artificialspacers made of polypeptides which may be as small as, for example, Gly3or CHI and CH3 domains of IgGs (such as human IgG4). In someembodiments, the extracellular spacer domain is any one or more of (i) ahinge, CH2 and CH3 regions of IgG4, (ii) a hinge region of IgG4, (iii) ahinge and CH2 of IgG4, (iv) a hinge region of CD8a, (v) a hinge, CH2 andCH3 regions of IgG1, (vi) a hinge region of IgG1 or (vi) a hinge and CH2region of IgG1. Other extracellular spacer domains will be apparent tothose of skill in the art and may be used in connection with alternateembodiments, provided herein.

In some embodiments, a short oligo- or polypeptide linker, from about 1to 100 amino acids in length, is used to link together any of thedomains of a DDpp-CAR. Linkers can be composed of flexible residues likeglycine and serine (or any other amino acid) so that the adjacentprotein domains are free to move relative to one another. The aminoacids sequence composition of the linker may be selected to minimizepotential immunogenicity of the DDpp-CAR or DDpp fusion protein. Longerlinkers can be used when it is desirable to ensure that two adjacentdomains do not sterically interfere with one another. In someembodiments, preferably between 2 and 10 amino acids in length forms thelinkage between the transmembrane domain and the cytoplasmic signalingdomain of the DDpp-CAR. In further embodiments, the linker is between 10and 15 amino acids in length, or between 15 and 20, or between 20 and30, or between 30 and 60, or between 60 and 100 amino acids in length(or any range in between those listed). In further embodiments, thelinker is a glycine-serine doublet sequence. Further embodiments employa fragment of the hinge region derived from the human T cell surfaceglycoprotein CD8 alpha-chain (for example ranging from amino acidpositions 138-182 CD8 alpha chain; Swiss-Prot accession number P01732).Further embodiments employ a fragment of the CD8 hinge region that hasbeen further modified, through amino acid substitution, to improveexpression function or immunogenicity. Further embodiments employ afragment of the extracellular region derived from the human CD28 Furtherembodiments employ a fragment of the CD28 extracellular region that hasbeen further modified, through amino acid substitution, to improveexpression function or immunogenicity.

Intracellular Domain

“Intracellular signaling domain” (ISD) or “cytoplasmic domain” as usedherein refer to the portion of the DDpp-CAR which transduces theeffector function signal and directs the cell to perform its specializedfunction. The cytoplasmic domain (i.e., intracellular signaling domain)of a DDpp-CAR is responsible for activation of at least one of thenormal effector functions of an immune cell engineered to express aDDpp-CAR. The term “effector function” refers to a specialized functionof a cell. The effector function of a T cell, for example, includescytolytic activity and helper activity including the secretion ofcytokines. Thus the term “intracellular signaling domain” refers to theportion of a DDpp-CAR protein which transduces the effector functionsignal and directs the cell to perform a specialized function. Whiletypically the entire intracellular signaling domain corresponding to anaturally occurring receptor can be employed, in many cases it is notnecessary to use the entire chain. To the extent that a truncatedportion of the intracellular signaling domain is used, such truncatedportion can be used in place of the intact chain as long as ittransduces the effector function signal. The term intracellularsignaling domain is thus meant to include any truncated portion of theintracellular signaling domain sufficient to transduce the effectorfunction signal. In one embodiment, an intracellular signaling domain inthe DDpp-CAR includes the cytoplasmic sequences of the T cell receptor(TCR) and also the sequence of co-receptors that act in concert toinitiate signal transduction following antigen receptor engagement, orany derivative or variant of these sequences that has functionalcapability. Examples of domains that transduce an effector functionsignal include but are not limited to the ζ chain of the T cell receptorcomplex or any of its homologs (e.g., η chain, FcsR1y and β chains, MB 1(Iga) chain, B29 (Ig) chain, etc.), human CD3 zeta chain, CD3polypeptides (Δ, δ and ε), syk family tyrosine kinases (Syk, ZAP 70,etc.), src family tyrosine kinases (Lck, Fyn, Lyn, etc.) and othermolecules involved in T cell transduction, such as CD2, CD5 and CD28.

It is known that signals generated through the TCR alone areinsufficient for full activation of the T cell and that a secondary orco-stimulatory signal is also required. Thus, T cell activation can besaid to be mediated by two distinct classes of cytoplasmic signalingsequence: those that initiate antigen-dependent primary activationthrough the TCR (primary cytoplasmic signaling sequences) and those thatact in an antigen-independent manner to provide a secondary orco-stimulatory signal (secondary cytoplasmic signaling sequences).

Primary cytoplasmic signaling sequences regulate primary activation ofthe TCR complex either in a stimulatory way, or in an inhibitory way.Primary cytoplasmic signaling sequences that act in a stimulatory mannermay contain signaling motifs which are known as immunoreceptortyrosine-based activation motifs (ITAMs).

Examples of ITAM containing primary cytoplasmic signaling sequences thatare of particular use in the provided embodiments include those derivedfrom TCR zeta, FcR gamma, FcR beta, CD3 gamma, CD3 delta, CD3 epsilon,CD22, CD79a, CD79b, and CD66d. It is particularly preferred thatcytoplasmic signaling molecule in the CAR comprises a cytoplasmicsignaling sequence derived from CD3 zeta.

“Co-stimulatory domain” (CSD) as used herein refers to the portion of aCAR or DDpp-CAR which enhances the proliferation, survival and/ordevelopment of memory cells. The DDpp-CAR may comprise one or moreco-stimulatory domains. Each co-stimulatory domain comprises thecostimulatory domain of any one or more of, for example, a member of theTNFR superfamily, selected from CD28, CD137 (4-1BB), CD134 (OX40),Dap10, CD27, CD2, CD5, ICAM-1, LFA-1(CD11a/CD18), Lck, TNFR-I, TNFR-II,Fas, CD30, and CD40 or a combination thereof. Other co-stimulatorydomains (e.g., from other proteins) will be apparent to those of skillin the art and may be used in connection with alternate embodimentsencompassed by the disclosure.

In a preferred embodiment, the cytoplasmic domain of a DDpp-CARcomprises the CD3-zeta signaling domain by itself or combined with anyother desired cytoplasmic domain(s) useful in the context of theDDpp-CAR. For example, the cytoplasmic domain of the DDpp-CAR cancomprise a CD3 zeta chain portion and a costimulatory signaling region.The costimulatory signaling region refers to a portion of the CARcomprising the intracellular domain of a costimulatory molecule. Acostimulatory molecule is a cell surface molecule other than an antigenreceptor or their ligands that is required for an efficient response oflymphocytes to an antigen. Examples of such molecules include CD27,CD28, 41BB (CD 137), OX40, CD30, CD40, PD1, ICOS, lymphocytefunction-associated antigen-1 (LFA1), CD2, CD7, LIGHT, NKG2C, B7H3,TIM1, and LAG3.

Polypeptide linkers may be positioned between adjacent elements of theDDpp-CAR. For example linkers may be positioned between adjacent DDpp orbetween DDpp and the transmembrane domain or between the transmembranedomain and the cytoplasmic domain or between adjacent cytoplasmicdomains. The cytoplasmic signaling sequences within the cytoplasmicsignaling portion of the DDpp-CAR may be linked to each other in arandom or specified order. Optionally, a short linker, preferablybetween 2 and 10 amino acids in length may form the linkage. Aglycine-serine doublet provides a particularly suitable linker.

In additional embodiments, the DDpp fusion protein is a chimeric antigenreceptor (CAR) which comprises a target binding domain comprising a DDdisclosed herein (e.g., a DD comprising the amino acid sequence of SEQID NO: 11-949, or 950). In some embodiments, the DD binds BCMA andcomprises an amino acid sequence selected from the group consisting ofSEQ ID NO: 11-305, and 306. In some embodiments, the DD binds CD123 andcomprises an amino acid sequence selected from the group consisting ofSEQ ID NO: 307-739, and 740. In some embodiments, the DD binds CS1 andcomprises an amino acid sequence selected from the group consisting ofSEQ ID NO: 896-909, and 910. In some embodiments, the DD binds HER2 andcomprises an amino acid sequence selected from the group consisting ofSEQ ID NO: 911-949, and 950. In some embodiments, the DD binds AFP andcomprises an amino acid sequence selected from the group consisting ofSEQ ID NO: 741-874, and 886-895. In some embodiments, the DD binds AFPp26 and comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 741-874, and 886-895. In some embodiments, theCAR comprises, a target binding domain, a transmembrane domain, and anintracellular signaling domain. In some embodiments, the CARtransmembrane domain comprises a 41BB or CD28 transmembrane domain. Insome embodiments the CAR comprises an intracellular signaling domainselected from the group consisting of a domain of a human T cellreceptor alpha, beta, or zeta chain; a human 41 BB domain; a human CD28domain; and any combination thereof. In some embodiments, the CARintracellular signaling domain comprises the intracellular domain of acostimulatory molecule selected from the group consisting of CD27, CD28,41BB, OX40, CD30, CD40, PD1, lymphocyte function-associated antigen-1(LFA-1), CD2. CD7, LIGHT. NKG2C, B7-H3, a ligand that specifically bindswith CD83, and any combination thereof. In some embodiments the CARfurther comprises a second target binding domain having the same or adifferent target than the DD target binding domain. In some embodiments,the CAR comprises a first target binding domain that hinds CSI and asecond target binding domain that binds BCMA. In some embodiments, theCAR is expressed in an immune cell. In some embodiments, the immune cellis a T cell (CAR-T cell) or a natural killer (NK) cell (CAR-NK cell). Insome embodiments, the CAR is associated with a liposome. In someembodiments, the CAR comprises 2, 3, 4, 5, or more than 5, DD and/orother binding domains (e.g., scFv) that specifically bind a target ofinterest (e.g., BCMA, CS1, or CD123) expressed on the surface of thecancer cell. In additional embodiments, the CAR comprises 2, 3, 4, 5, ormore than 5, DD or other binding domains (e.g., scFv) that specificallybind a second, different target of interest, expressed on the surface ofthe cancer cell. In additional embodiments, the administered CAR furthercomprises 2, 3, 4, 5, or more than 5, DD or other binding domains (e.g.,scFv) that specifically binds a second, different target of interest,expressed by a second, different cancer cell or a vascular endothelialcell.

Additional DDpp Fusion Proteins

In some embodiments, the DDpp contains a heterologous polypeptidecomprising a fragment consisting of 5-500, 5-400, 5-300, 5-200, 5-100,5-50, 10-500, 10-400, 10-300, 10-200, 10-100, or 10-50 amino acids of anextracellular domain, of a cell surface receptor. In some embodiments,the DDpp contains a heterologous polypeptide that comprises theextracellular domain, or a fragment of an extracellular domain of BCMA(SEQ ID NO: 7) or CD123 (SEQ ID NO: 8). In some embodiments, the DDppcontains a heterologous polypeptide that comprises the extracellulardomain, or a fragment of an extracellular domain of BCMA (SEQ ID NO: 7),or CD123 (SEQ ID NO: 8), or CS1 (SEQ ID NO: 965). In some embodiments,the DDpp contains a heterologous polypeptide that comprises theextracellular domain, or a fragment of an extracellular domain, of areceptor selected from the group consisting of: CD19, CD20, CD22, HVEM,BTLA, DR3, CD37; TSLPR, IL7R, and gp96.

In some embodiments, the protein contains a heterologous polypeptidethat comprises a serum protein or an antigenic fragment of a serumprotein (e.g., AFP, and AFP p26). In some embodiments, the DDpp containsa heterologous polypeptide comprising a fragment consisting of 5-500,5-400, 5-300, 5-200, 5-100, 5-50, 10-500, 10-400, 10-300, 10-200,10-100, or 10-50 amino acids of a serum protein. In some embodiments,the protein contains a heterologous polypeptide that comprises anintracellular protein or an antigenic portion of an intracellularprotein (e.g., a nuclear protein). In some embodiments, the DDppcontains a heterologous polypeptide comprising a fragment consisting of5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500, 10-400, 10-300, 10-200,10-100, or 10-50 amino acids of an intracellular protein. In someembodiments, the DDpp contains a heterologous polypeptide having thesequence of SEQ ID NO: 10, 968, 969, 970, 971, 972, 973, or 974.

In some embodiments, the DDpp fusion protein specifically binds BCMA,CD123, CS1, HER2, AFP, and/or AFP p26, and further binds one or moreadditional targets of interest. The targets of interest specificallybound by a DDpp fusion protein can be any molecule for which it isdesirable for a DDpp to bind. For example, the targets specificallybound by the DDpp fusion protein can be BCMA, CD123, CS1, HER2, AFP,and/or AFP p26, and additionally any additional target of manufacturing,formulation, therapeutic, diagnostic, or prognostic relevance or value.A number of exemplary additional targets are provided herein, by way ofexample, and are intended to be illustrative and not limiting. Theadditional target of interest bound by the DDpp fusion protein can benaturally occurring or synthetic. The additional target of interest canbe an extracellular component or an intracellular component, a solublefactor (e.g., an enzyme, hormone, cytokine, and growth factor, toxin,venom, pollutant, etc.), or a transmembrane protein (e.g., a cellsurface receptor). In some embodiments, the target of interest bound bythe DDpp fusion protein is a human protein. In one embodiment, a DDpp(e.g., a DDpp fusion protein) binds a human protein target of interestand its monkey (e.g., cynomolgous monkey), mouse, rabbit, hamster and/ora rabbit ortholog.

In one embodiment a DDpp fusion protein specifically binds BCMA, CD123,CS1, HER2, AFP, and/or AFP p26, and a serum protein. In one embodiment,the DDpp fusion protein specifically binds a serum protein selectedfrom: serum albumin (e.g., human serum albumin (HSA)), thyroxin-bindingprotein, transferrin, fibrinogen, and an immunoglobulin (e.g., IgG, IgEand IgM). Without being bound by theory, the binding of a DDpp to acarrier protein is believed to confer upon the DDpp (or a fusionthereof) an improved pharmacodynamic profile that includes, but is notlimited to, improved tumor targeting, tumor penetration, diffusionwithin the tumor, and enhanced therapeutic activity compared to the DDppfusion protein in which the carrier protein binding sequence is missing(see, e.g., WO01/45746, the contents of which is herein incorporated byreference in its entirety).

Antibody-Based DDpp Fusion Proteins

In some embodiments, the DDpp fusion protein comprises a full-lengthantibody or a fragment or subdomain of an antibody. In some embodiment,the DDpp fusion protein comprises a full length IgG antibody (e.g.,IgG1, IgG2, IgG2, or IgG4). In further embodiments, the DDpp fusionprotein comprises a full length antibody that specifically binds acancer antigen. In further embodiments, the DDpp comprises acommercially approved therapeutic antibody (e.g., rituximab, ofatumumab,ocrelizumab, veltuzumab, MEDI-551, epratuzumab, belimumab, tabalumab,AMG-557, MEDI-570, and NN882). In other embodiments, the DDpp is an Fcfusion protein. In further embodiments, the Fc protein comprises avariant human Fc domain.

In some embodiments, the DDpp fusion protein comprises a full-lengthantibody or an antibody fragment or subdomain (e.g., an IgG1 antibody,IgG3 antibody, antibody variable region, CDR3, scFv, Fc, FcRn bindingsubdomain, and other antibody subdomains). DDpp proteins can be operablylinked to one another and/or to one or more termini of an antibody,antibody chain, antibody fragment, or antibody subdomain to form a DDppfusion protein.

The antibody component of a DDpp fusion protein can be any suitablefull-length immunoglobulin or antibody fragment (e.g., an antigenbinding domain and/or effector domain) or a fragment thereof. In oneembodiment, the DDpp-antibody fusion protein retains the structural andfunctional properties of a traditional monoclonal antibody. Thus, insome embodiments, the DDpp-antibody fusion protein retains the epitopebinding properties, but advantageously also incorporate, via the DDppfusion, one or more additional target-binding specificities. Antibodiesthat can be used in the DDpp fusions include, but are not limited to,monoclonal, multi-specific, human, humanized, primatized, and chimericantibodies. Immunoglobulin or antibody molecules provided herein can beof any type (e.g., IgG, IgE, IgM, IgD, IgA, and IgY), class (e.g., IgG1,IgG2, IgG3, IgG4, IgA1 and IgA2) or subclass of immunoglobulin molecule.In specific embodiments, the antibodies are Fc optimized antibodies.Antibodies can be from or derived from any animal origin including birdsand mammals or generated synthetically. The antibody component of theDDpp-antibody fusion protein can be naturally derived or the result ofrecombinant engineering (e.g., phage display, xenomouse, and synthetic).In certain embodiments, the antibody component of the antibody-DDppfusion enhances half-life, and increase or decrease antibody dependentcellular cytotoxicity (ADCC), and/or complement dependent cytotoxicity(CDC) activity. In some embodiments, the antibodies are human, murine,donkey, rabbit, goat, guinea pig, camel, llama, horse, or chickenantibodies. In specific embodiments, the antibodies are human.

It is generally understood that the constant region mediates severaleffector functions. For example, binding of the C1 component ofcomplement to antibodies activates the complement system. Activation ofcomplement is important in the opsonization and lysis of cell pathogens.The activation of complement also stimulates the inflammatory responseand can also be involved in autoimmune hypersensitivity. Further,antibodies bind to cells via the Fc region, with an Fc receptor site onthe antibody Fc region binding to an Fc receptor (FcR) on a cell. Thereare a number of Fc receptors that are specific for different classes ofantibody, including IgG (gamma receptors), IgE (eta receptors), IgA(alpha receptors) and IgM (mu receptors). Binding of antibody to Fcreceptors on cell surfaces triggers a number of important and diversebiological responses including engulfment and destruction ofantibody-coated particles, clearance of immune complexes, lysis ofantibody-coated target cells by killer cells (called antibody-dependentcell-mediated cytotoxicity, or ADCC), release of inflammatory mediators,placental transfer and control of immunoglobulin production.

In certain embodiments, the DDpp-Fc fusion protein has an alteredeffector function that, in turn, affects the biological profile of theadministered DDpp-Fc fusion protein. For example, the deletion orinactivation (through point mutations or other means) of a constantregion subdomain can reduce Fc receptor binding of the circulatingmodified antibody. In other cases the constant region modifications, canmoderate complement binding and thus reduce the serum half-life andnonspecific association of a conjugated cytotoxin. Yet othermodifications of the constant region can be used to eliminate disulfidelinkages or oligosaccharide moieties that allow for enhancedlocalization due to increased antigen specificity or antibodyflexibility. Similarly, modifications to the constant region inaccordance with this disclosure can easily be made using biochemical ormolecular engineering techniques known to those of ordinary skill in theart.

In some embodiments, the DDpp-Fc fusion protein does not have one ormore effector functions. For instance, in some embodiments, the DDpp-Fcfusion protein has no antibody-dependent cellular cytoxicity (ADCC)activity and/or no complement-dependent cytoxicity (CDC) activity. Incertain embodiments, the DDpp-Fc fusion protein does not bind to an Fcreceptor and/or complement factors. In certain embodiments, the DDpp-Fcfusion protein has no effector function. Examples of Fc sequenceengineering modifications that reduce or eliminate ADCC and/or CDCactivity and Fc receptor and/or complement factor binding are describedherein or otherwise know in the art, as are assays and procedures fortesting the same.

In some embodiments, DDpp-Fc fusion protein is engineered to fuse theCH3 domain directly to the hinge region of the respective modifiedantibody. In other constructs a peptide spacer is inserted between thehinge region and the modified CH2 and/or CH3 domains. For example,compatible constructs can be expressed in which the CH2 domain has beendeleted and the remaining CH3 domain (modified or unmodified) is joinedto the hinge region with a 5-20 amino acid spacer. Such a spacer can beadded, for instance, to ensure that the regulatory elements of theconstant domain remain free and accessible or that the hinge regionremains flexible. Amino acid spacers can, in some cases, prove to beimmunogenic and elicit an unwanted immune response against theconstruct. Accordingly, in certain embodiments, any spacer added to theconstruct can be relatively non-immunogenic, or even omitted altogether,so as to maintain the desired biochemical qualities of the modifiedDDpp-Fc fusion protein.

In additional embodiments, the DDpp-Fc fusion protein is modified by thepartial deletion or substitution of a few or even a single amino acid ina constant region. For example, the mutation of a single amino acid inselected areas of the CH2 domain can be enough to substantially reduceFc binding and thereby. Similarly one or more constant region domainsthat control the effector function (e.g., complement C1Q binding) can befully or partially deleted. Such partial deletions of the constantregions can improve selected characteristics of the DDpp-Fc fusionprotein (e.g., serum half-life) while leaving other desirable functionsassociated with the corresponding constant region domain intact. In someembodiments, the constant region of the DDpp-Fc fusion protein ismodified through the mutation or substitution of one or more amino acidsthat enhances the profile of the resulting construct. In this respect itis possible to disrupt the activity provided by a conserved binding site(e.g., Fc binding) while substantially maintaining the configuration andimmunogenic profile of the modified DDpp-Fc fusion protein. Thedisclosure also provides an DDpp-Fc fusion protein that contains theaddition of one or more amino acids to the constant region to enhancedesirable characteristics such, as decreasing or increasing effectorfunction or providing attachments sites for one or more cytotoxin,labeling or carbohydrate moieties. In such embodiments, it can bedesirable to insert or replicate specific sequences derived fromselected constant region domains.

In some embodiments, the DDpp is operably linked to an antibody fragmentor subdomain (e.g., scFv, diabody, EP 404,097; WO93/111161; WO14/028776;and Holliger et al., PNAS 90: 6444-6448 (1993), the contents of each ofwhich is herein incorporated by reference in its entirety). The antibodyfragment or subdomain can be any fragment or domain of an antibody. Seefor example, WO04/058820, WO99/42077 and WO05/017148, the contents ofeach of which is herein incorporated by reference in its entirety. Forexample, a DDpp fusion protein can contain an antibody effector domainor derivative of an antibody effector domain that confers one or moreeffector functions to the DDpp and/or confers upon the DDpp fusionprotein the ability to bind to one or more Fc receptors. In someembodiments, a DDpp-antibody fusion protein contains an antigen-bindingfragment of an antibody or a fragment thereof. In additionalembodiments, a DDpp-antibody fusion protein contains an immunoglobulineffector domain that comprises one or more CH2 and or CH3 domains of anantibody having effector function provided by the CH2 and CH3 domains.Other sequences in the DDpp fusion that provide an effector function andthat are encompassed by the invention will be clear to those skilled inthe art and can routinely be chosen and designed into a DDpp fusionprotein encompassed herein on the basis of the desired effectorfunction(s).

In one embodiment, the DDpp fusion contains a full-length antibody or anantibody fragment that is an antigen-binding fragment. In a furtherembodiment, the antibody or antibody fragment binds a disease-relatedantigen. In one embodiment the DDpp fusion protein comprises an antibodyor an antibody fragment that specifically binds a cancer antigen. Inanother embodiment, the DDpp fusion protein comprises an antibody or anantibody fragment that specifically binds a particular pathogen (e.g., abacterial cell (e.g., tuberculosis, smallpox, anthrax)), a virus (e.g.,HIV), a parasite (e.g., malaria, leishmaniosis), a fungal infection, amold, a mycoplasm, a prion antigen, In another embodiment, the DDppfusion protein comprises an antibody or an antibody fragment thatspecifically binds a particular pathogen (e.g., a bacterial cell (e.g.,tuberculosis, smallpox, anthrax)), a virus (e.g., HIV), a parasite(e.g., malaria, leishmaniosis), a fungal infection, a mold, a mycoplasm,or a prion antigen. In another embodiment, the DDpp fusion proteincomprises an antibody or an antibody fragment that specifically binds anantigen associated with a disease or disorder of the immune system.

In preferred embodiments, the DDpp fusion protein containing an antibodyfragment or domain retains activities of the parent antibody. Thus, incertain embodiments, the DDpp fusion protein containing an antibodyfragment or domain is capable of inducing complement dependentcytotoxicity. In certain embodiments, the DDpp fusion protein containingan antibody fragment or domain is capable of inducing antibody dependentcell mediated cytotoxicity (ADCC).

Accordingly, in some embodiments, the DDpp fusion protein comprises anantibody fragment that confers upon the DDpp fusion protein a biologicalor biochemical characteristic of an immunoglobulin. In some embodiments,the antibody fragment confers a characteristic selected from: theability to non-covalently dimerize, the ability to localize at the siteof a tumor, and an increased serum half-life when compared to the DDppfusion protein in which said one or more DDpp have been deleted. Incertain embodiments, the DDpp fusion protein is at least as stable asthe corresponding antibody without the attached DDpp. In certainembodiments, the DDpp fusion protein is more stable than thecorresponding antibody without the attached DDpp. DDpp fusion proteinstability can be measured using established methods, including, forexample, ELISA techniques. In some embodiments, the DDpp fusion proteinis stable in whole blood (in vivo or ex vivo) at 37° C. for at leastabout 10 hours, at least about 15 hours, at least about 20 hours, atleast about 24 hours, at least about 25 hours, at least about 30 hours,at least about 35 hours, at least about 40 hours, at least about 45hours, at least about 48 hours, at least about 50 hours, at least about55 hours, at least about 60 hours, at least about 65 hours, at leastabout 70 hours, at least about 72 hours, at least about 75 hours, atleast about 80 hours, at least about 85 hours, at least about 90 hours,at least about 95 hours, or at least about 100 hours (including any timebetween those listed). In one embodiment, a DDpp fusion contains animmunoglobulin effector domain or half-life influencing domain thatcorresponds to an immunoglobulin domain or fragment in which at least afraction of one or more of the constant region domains has been alteredso as to provide desired biochemical characteristics such as reduced orincreased effector functions, the ability to non-covalently dimerize,increased ability to localize at the site of a tumor, reduced serumhalf-life, or increased serum half-life when compared with animmunoglobulin fragment having the corresponding unalteredimmunoglobulin sequence. These alterations of the constant regiondomains can be amino acid substitutions, insertions, or deletions.

In one embodiment, a DDpp fusion protein comprises an amino acidsequence of an immunoglobulin effector domain or a derivative of animmunoglobulin effector domain that confers antibody dependent cellularcytotoxicity (ADCC) to the DDpp fusion protein. In additionalembodiments, a DDpp fusion protein comprises a sequence of animmunoglobulin effector domain that has been modified to increase ADCC(see, e.g., Bruhns, Blood 113: 3716-3725 (2009); Shields, J. Biol. Chem.276: 6591-6604 (2001); Lazar, PNAS 103: 4005-4010 (2006); Stavenhagen,Cancer Res. 67: 8882-8890 (2007); Horton, Cancer Res. 68: 8049-8057(2008); Zalevsky, Blood 113: 3735-3743 (2009); Bruckheimer, Neoplasia11: 509-517 (2009); WO06/020114; Strohl, Curr. Op. Biotechnol. 20:685-691 (2009); and WO04/074455; the contents of each of which is hereinincorporated by reference in its entirety). Examples of immunoglobulinfragment engineering modifications contained in an amino acid sequencein a DDpp fusion protein that increases ADCC include immunoglobulineffector domain sequences having one or more modifications correspondingto: IgG1-S298A, E333A, K334A; IgG1-S239D, I332E; IgG1-S239D, A330L,I332E; IgG1-P247I, A339D or Q; IgG1-D280H, K290S with or without S298Dor V; IgG1-F243L, R292P, Y300L; IgG1-F243L, R292P, Y300L, P396L; andIgG1-F243L, R292P, Y300L, V305I, P396L; wherein the numbering of theresidues in the Fc region is that of the EU index of Kabat et al. (Kabatet al., Sequences of proteins of Immunological Interest, 1991 Fifthedition, the contents of which is herein incorporated by reference inits entirety).

In other embodiments, a DDpp fusion protein comprises a sequence of animmunoglobulin effector domain that has been modified to decrease ADCC(see, e.g., Idusogie et al., J. Immunol. 166: 2571-2575 (2001); Sazinskyet al., PNAS 105: 20167-20172 (2008); Davis et al., J. Rheumatol. 34:2204-2210 (2007); Bolt et al., Eur. J. Immunol. 23: 403-411 (1993);Alegre et al., Transplantation 57: 1537-1543 (1994); Xu et al., CellImmunol. 200: 16-26 (2000); Cole et al., Transplantation 68: 563-571(1999); Hutchins et al., PNAS 92: 11980-11984 (1995); Reddy et al., J.Immunol. 164: 1925-1933 (2000); WO97/11971; WO07/106585; US2007/0148167A1; McEarchern et al., Blood 109: 1185-1192 (2007); Strohl,Curr. Op. Biotechnol. 20: 685-691 (2009); and Kumagai et al., J. Clin.Pharmacol. 47: 1489-1497 (2007), the contents of each of which is hereinincorporated by reference in its entirety). Examples of immunoglobulinfragment sequence engineering modifications contained in an amino acidsequence in a DDpp fusion protein that decreases ADCC includeimmunoglobulin effector domain sequences having one or moremodifications corresponding to: IgG1-K326W, E333S; IgG2-E333S;IgG1-N297A; IgG1-L234A, L235A; IgG2-V234A, G237A; IgG4-L235A, G237A,E318A; IgG4-S228P, L236E; IgG2-118-260; IgG4-261-447; IgG2-H268Q, V309L,A330S, A331S; IgG1-C220S, C226S, C229S, p268S; IgG1-C226S, C229S, E233P,L234V, L235A; or IgG1-L234F, L235E, P331S; wherein the numbering of theresidues is that of the EU index of Kabat (Kabat et al., Sequences ofProteins of Immunological Interest, 1991 Fifth edition, the contents ofwhich is herein incorporated by reference in its entirety).

In additional embodiments, a DDpp fusion protein comprises an amino acidsequence of an immunoglobulin effector domain, or a derivative of animmunoglobulin effector domain, that confers antibody-dependent cellphagocytosis (ADCP) to the DDpp fusion protein. In additionalembodiments, a DDpp fusion protein comprises a sequence of animmunoglobulin effector domain that has been modified to increaseantibody-dependent cell phagocytosis (ADCP); (see, e.g., Shields et al.,J. Biol. Chem. 276: 6591-6604 (2001); Lazar et al., PNAS 103: 4005-4010(2006); Stavenhagen et al., Cancer Res. 67: 8882-8890 (2007); Richardset al., Mol. Cancer Ther. 7: 2517-2527 (2008); Horton et al., CancerRes. 68: 8049-8057 (2008), Zalevsky et al., Blood 113: 3735-3743 (2009);Bruckheimer et al., Neoplasia 11: 509-517 (2009); WO06/020114; Strohl,Curr. Op. Biotechnol. 20: 685-691 (2009); and WO04/074455, the contentsof each of which is herein incorporated by reference in its entirety).Examples of immunoglobulin fragment engineering modifications containedin an amino acid sequence in a DDpp fusion protein that increases ADCPinclude immunoglobulin effector domain sequences having one or moremodifications corresponding to: IgG1-S298A, E333A, K334A; IgG1-S239D,I332E; IgG1-S239D, A330L, I332E; IgG1-P247I, A339D or Q; IgG1-D280H,K290S with or without S298D or V; IgG1-F243L, R292P, Y300L; IgG1-F243L,R292P, Y300L, P396L; IgG1-F243L, R292P, Y300L, V305I, P396L; andIgG1-G236A, S239D, 1332E; wherein the numbering of the residues is thatof the EU index of Kabat et al. (Kabat et al., Sequences of proteins ofImmunological Interest, 1991 Fifth edition, the contents of which isherein incorporated by reference in its entirety).

In other embodiments, a DDpp fusion protein comprises a sequence of animmunoglobulin effector domain that has been modified to decrease ADCP(see, e.g., Sazinsky et al., PNAS 105: 20167-20172 (2008); Davis et al.,J. Rheumatol. 34: 2204-2210 (2007); Bolt et al., Eur. J. Immunol. 23:403-411 (1993); Alegre et al., Transplantation 57: 1537-1543 (1994); Xuet al., Cell Immunol. 200: 16-20 (2000); Cole et al., Transplantation68: 563-571 (1999); Hutchins et al., PNAS 92: 11980-11984 (1995); Reddyet al., J. Immunol. 164: 1925-1933 (2000); WO97/11971; WO07/106585; US2007/0148167A1; McEarchern et al., Blood 109: 1185-1192 (2007); Strohl,Curr. Op. Biotechnol. 20: 685-691 (2009); and Kumagai et al., J. Clin.Pharmacol. 47: 1489-1497 (2007), the contents of each of which is hereinincorporated by reference in its entirety). By way of example, DDppfusion proteins can contain an antibody fragment or domain that containsone or more of the following modifications that decrease ADCC:IgG1-N297A; IgG1-L234A, L235A; IgG2-V234A, G237A; IgG4-L235A, G237A,E318A; IgG4-S228P, L236E; IgG2 EU sequence 118-260; IgG4-EU sequence261-447; IgG2-H268Q, V309L, A330S, A331S; IgG1-C220S, C226S, C229S,p268S; IgG1-C226S, C229S, E233P, L234V, L235A; and IgG1-L234F, L235E,P331S; wherein the numbering of the residues is that of the EU index ofKabat et al. (Kabat et al., Sequences of proteins of ImmunologicalInterest, 1991 Fifth edition, the contents of which is hereinincorporated by reference in its entirety).

In additional embodiments, a DDpp fusion protein comprises an amino acidsequence of an immunoglobulin effector domain, or a derivative of animmunoglobulin effector domain, that confers complement-dependentcytotoxicity (CDC) to the DDpp fusion protein. In additionalembodiments, a DDpp fusion protein comprises a sequence of animmunoglobulin effector domain that has been modified to increasecomplement-dependent cytotoxicity (CDC) (see, e.g., Idusogie et al., J.Immunol. 166: 2571-2575 (2001); Strohl, Curr. Op. Biotechnol. 20:685-691 (2009); and Natsume et al., Cancer Res. 68: 3863-3872 (2008),the contents of each of which is herein incorporated by reference in itsentirety). By way of example, DDpp fusion proteins can contain anantibody fragment or domain that contains one or more of the followingmodifications that increase CDC: IgG1-K326A, E333A; IgG1-K326W, E333S,IgG2-E333S; wherein the numbering of the residues is that of the EUindex of Kabat et al. (Kabat et al., Sequences of proteins ofImmunological Interest, 1991 Fifth edition, the contents of which isherein incorporated by reference in its entirety).

In additional embodiments, a DDpp fusion protein comprises an amino acidsequence of an immunoglobulin effector domain, or a derivative of animmunoglobulin effector domain, that confers the ability to bindFcgammaRIIb receptor to the DDpp fusion. In additional embodiments, aDDpp fusion protein comprises a sequence of an immunoglobulin effectordomain that has been modified to increase inhibitory binding toFcgammaRIIb receptor (see, e.g., Chu et al., Mol. Immunol. 45: 3926-3933(2008)). An example of an immunoglobulin fragment engineeringmodification contained in an amino acid sequence in a DDpp fusionprotein that increases binding to inhibitory FcgammaRIIb receptor isIgG1-S267E, L328F.

In other embodiments, a DDpp fusion protein comprises a sequence of animmunoglobulin effector domain that has been modified to decrease CDC(see, e.g., WO97/11971; WO07/106585; US 2007/0148167A1; McEarchern etal., Blood 109: 1185-1192 (2007); Hayden-Ledbetter et al., Clin. Cancer15: 2739-2746 (2009); Lazar et al., PNAS 103: 4005-4010 (2006);Bruckheimer et al., Neoplasia 11: 509-517 (2009); Strohl, Curr. Op.Biotechnol. 20: 685-691 (2009); and Sazinsky et al., PNAS 105:20167-20172(2008); the contents of each of which is herein incorporatedby reference in its entirety). By way of example, DDpp fusion proteinscan contain an antibody fragment or domain that contains one or more ofthe following modifications that decrease CDC: IgG1-S239D, A330L, 1332E;IgG2-118-260; IgG4-261-447; IgG2-H268Q, V309L, A330S, A331S; IgG1-C226S,C229S, E233P, L234V, L235A; IgG1-L234F, L235E, P331S; and IgG1-C226S,p260S; wherein the numbering of the residues is that of the EU index ofKabat et al. (Kabat et al., Sequences of proteins of ImmunologicalInterest, 1991 Fifth edition, the contents of which is hereinincorporated by reference in its entirety).

The half-life of an IgG is mediated by its pH-dependent binding to theneonatal receptor FcRn. In certain embodiments, a DDpp fusion proteincomprises an amino acid sequence of an immunoglobulin effector domain,or a derivative of an immunoglobulin effector domain, that confers theability to bind neonatal receptor FcRn to the to the DDpp fusion. Incertain embodiments, a DDpp fusion protein comprises a sequence of animmunoglobulin FcRn binding domain that has been modified to enhancebinding to FcRn (see, e.g., Petkova et al., Int. Immunol. 18: 1759-1769(2006); Dall'Acqua et al., J. Immunol. 169: 5171-5180 (2002); Oganesyanet al., Mol. Immunol. 46: 1750-1755 (2009); Dall'Acqua et al., J. Biol.Chem. 281: 23514-23524 (2006); Hinton et al., J. Immunol. 176: 346-356(2006); Datta-Mannan et al., Drug Metab. Dispos. 35: 86-94 (2007);Datta-Mannan et al., J. Biol. Chem. 282: 1709-1717 (2007); WO06/130834;Strohl, Curr. Op. Biotechnol. 20: 685-691 (2009); and Yeung et al., J.Immunol. 182: 7663-7671 (2009); the contents of each of which is hereinincorporated by reference in its entirety).

In additional embodiments, a DDpp fusion protein comprises a sequence ofan immunoglobulin effector domain that has been modified to have aselective affinity for FcRn at pH 6.0, but not pH 7.4. By way ofexample, DDpp fusion proteins can contain an antibody fragment or domainthat contains one or more of the following modifications that increasehalf-life: IgG1-M252Y, S254T, T256E; IgG1-T250Q, M428L; IgG1-H433K,N434Y; IgG1-N434A; and IgG1-T307A, E380A, N434A; wherein the numberingof the residues is that of the EU index of Kabat et al. (Kabat et al.,Sequences of Proteins of Immunological Interest, 1991 Fifth edition, thecontents of which is herein incorporated by reference in its entirety).

In other embodiments, a DDpp fusion protein comprises a sequence of animmunoglobulin effector domain that has been modified to decreasebinding to FcRn (see, e.g., Petkova et al., Int. Immunol. 18: 1759-1769(2006); Datta-Mannan et al., Drug Metab. Dispos. 35: 86-94 (2007);Datta-Mannan et al., J. Biol. Chem. 282: 1709-1717 (2007); Strohl, Curr.Op. Biotechnol. 20: 685-691 (2009); and Vaccaro et al., Nat. Biotechnol.23: 1283-1288 (2005); the contents of each of which is hereinincorporated by reference in its entirety). By way of example, DDppfusion proteins can contain an antibody fragment or domain that containsone or more of the following modifications that decrease half-life:IgG1-M252Y, S254T, T256E; H433K, N434F, 436H; IgG1-I253A; andIgG1-P257I, N434H and D376V, N434H; wherein the numbering of theresidues is that of the EU index of Kabat et al. (Kabat et al.,Sequences of proteins of Immunological Interest, 1991 Fifth edition, thecontents of which is herein incorporated by reference in its entirety).

According to another embodiment, DDpp fusion protein comprises an aminoacid sequence corresponding to a immunoglobulin effector domain that hasbeen modified to contain at least one substitution in its sequencecorresponding to the Fc region (e.g., FC gamma) position selected fromthe group consisting of: 238, 239, 246, 248, 249, 252, 254, 255, 256,258, 265, 267, 268, 269, 270, 272, 276, 278, 280, 283, 285, 286, 289,290, 292, 293, 294, 295, 296, 298, 301, 303, 305, 307, 309, 312, 315,320, 322, 324, 326, 327, 329, 330, 331, 332, 333, 334, 335, 337, 338,340, 360, 373, 376, 378, 382, 388, 389, 398, 414, 416, 419, 430, 434,435, 437, 438 and 439, wherein the numbering of the residues in the Fcregion is according to the EU numbering system; of Kabat et al. (Kabatet al., Sequences of proteins of Immunological Interest, 1991 Fifthedition, the contents of which is herein incorporated by reference inits entirety). In a specific embodiment, the DDpp fusion proteincomprises a sequence of an immunoglobulin effector domain derivativewherein at least one residue corresponding to position 434 is a residueselected from the group consisting of: A, W, Y, F and H. According toanother embodiment, the DDpp fusion protein comprises a sequence of animmunoglobulin effector fragment derivative having the followingrespective substitutions S298A/E333A/K334A. In an additional embodiment,the DDpp fusion protein comprises an immunoglobulin effector domainderivative having a substitution corresponding to K322A. In anotherembodiment, the DDpp fusion protein comprises a sequence of animmunoglobulin effector domain derivative having one or any combinationof the following substitutions K246H, H268D, E283L, S324G, S239D and1332E. According to yet another embodiment, a DDpp fusion proteincomprises a sequence of an immunoglobulin effector domain derivativehaving substitutions corresponding to D265A/N297A.

In certain embodiments, a DDpp fusion protein comprises a sequence of animmunoglobulin effector domain that has been glycoengineered or mutatedto increase effector function using techniques known in the art. Forexample, the inactivation (through point mutations or other means) of aconstant region domain sequence contained in a DDpp may reduce Fcreceptor binding of the circulating DDpp fusion protein therebyincreasing tumor localization. In other cases it may be that constantregion modifications consistent with certain provided embodiments,moderate complement binding and thus reduce the serum half-life andnonspecific association of a conjugated cytotoxin. Yet othermodifications of the constant region may be used to modify disulfidelinkages or oligosaccharide moieties that allow for enhancedlocalization due to increased antigen specificity or antibodyflexibility. The resulting physiological profile, bioavailability andother biochemical effects of the modifications, such as tumorlocalization, biodistribution and serum half-life, can easily bemeasured and quantified using well know immunological techniques withoutundue experimentation.

In some embodiments, an immune effector cell comprises a cell surfacereceptor for an immunoglobulin or other peptide binding molecule, suchas a receptor for an immunoglobulin constant region and including theclass of receptors commonly referred to as “Fc receptors” (“FcR”s). Anumber of FcRs have been structurally and/or functionally characterizedand are known in the art, including FcR having specific abilities tointeract with a restricted subset of immunoglobulin heavy chainisotypes, or that interact with Fc domains with varying affinities,and/or which may be expressed on restricted subsets of immune effectorcells under certain conditions (e.g., Kijimoto-Ochichai et al., CellMol. Life. Sci. 59: 648 (2002); Davis et al., Curr. Top. Microbiol.Immunol. 266: 85 (2002); Pawankar, Curr. Opin. Allerg. Clin. Immunol. 1:3 (2001); Radaev et al., Mol. Immunol. 38: 1073 (2002); Wurzburg et al.,Mol. Immunol. 38: 1063 (2002); Sulica et al., Int. Rev. Immunol. 20: 371(2001); Underhill et al., Ann. Rev. Immunol. 20: 825 (2002); Coggeshall,Curr. Dir. Autoimm. 5: 1 (2002); Mimura et al., Adv. Exp. Med. Biol.495: 49 (2001); Baumann et al., Adv. Exp. Med. Biol. 495: 219 (2001);Santoso et al., Ital. Heart J. 2: 811 (2001); Novak et al., Curr. Opin.Immunol. 13: 721 (2001); Fossati et al., Eur. J. Clin. Invest. 31: 821(2001)); the contents of each of which is herein incorporated byreference in its entirety.

Cells that are capable of mediating ADCC are examples of immune effectorcells. Other immune effector cells include Natural Killer cells,tumor-infiltrating T lymphocytes (TILs), cytotoxic T lymphocytes, andgranulocytic cells such as cells that comprise allergic responsemechanisms. Immune effector cells thus include, but are not limited to,cells of hematopoietic origin including cells at various stages ofdifferentiation within myeloid and lymphoid lineages and which may (butneed not) express one or more types of functional cell surface FcR, suchas T lymphocytes, B lymphocytes, NK cells, monocytes, macrophages,dendritic cells, neutrophils, basophils, eosinophils, mast cells,platelets, erythrocytes, and precursors, progenitors (e.g.,hematopoietic stem cells), as well as quiescent, activated, and matureforms of such cells. Other immune effector cells may include cells ofnon-hematopoietic origin that are capable of mediating immune functions,for example, endothelial cells, keratinocytes, fibroblasts, osteoclasts,epithelial cells, and other cells. Immune effector cells can alsoinclude cells that mediate cytotoxic or cytostatic events, or endocytic,phagocytic, or pinocytotic events, or that effect induction ofapoptosis, or that effect microbial immunity or neutralization ofmicrobial infection, or cells that mediate allergic, inflammatory,hypersensitivity and/or autoimmune reactions.

DDpp Fusion Proteins with Increased Half-Life

The disclosed DDpp can be fused or complexed to a second peptide domainincreases the half-life or stability of the DDpp.

In one aspect, the DDpp further comprises one or more amino acids thatfacilitate synthesis, handling, or use of the peptide, including, butnot limited to, one or two lysines at the N-terminus and/or C-terminusto increase solubility of the polypeptide. Suitable fusion proteinsinclude, but are not limited to, proteins comprising a DDpp linked toone or more polypeptides, polypeptide fragments, or amino acids notgenerally recognized to be part of the protein sequence. In one aspect,a fusion peptide comprises the entire amino acid sequences of two ormore peptides or, alternatively, comprises portions (fragments) of twoor more peptides. In some aspects, a peptide (e.g., Protein S-bindingpeptide) is operably linked to, for instance, one or more of thefollowing: a marker protein, a peptide that facilitates purification, apeptide sequence that promotes formation of multimeric proteins, or afragment of any of the foregoing. Suitable fusion partners include, butare not limited to, a His tag, a FLAG tag, a strep tag, and a myc tag.

In some embodiments, the DDpp is fused to one or more moieties thatenhance the half-life of the polypeptide. Half-life can be increased byfor example, increasing the molecular weight of the DDpp to avoid renalclearance and/or incorporating a binding domain for FcRn-mediatedrecycling pathway. In one embodiment, the DDpp is fused to, orchemically conjugated to, an albumin polypeptide or a fragment thereof(e.g., human serum albumin (HSA)). In particular embodiments, the fusedor chemically conjugated albumin fragment comprises 10%, 25%, 50%, or75% of the full length albumin protein. In additional or alternativeembodiments, the DDpp is fused to or complexed with an albumin bindingdomain or fatty acid that binds albumin when administered in vivo. Anexample of an albumin binding domain is “albu-tag,” a moiety derivedfrom on 4-(p-iodophenyl)-butanoic acid (Dumelin et al., Angew Chem. Int.Ed Engl. 47: 3196-3201 (2008)).

In one embodiment, the DDpp is fused to, or chemically conjugated to, atransferrin polypeptide or a fragment thereof (e.g., human transferrin).In particular embodiments, the fused or chemically conjugatedtransferrin fragment comprises 10%, 25%, 50%, or 75% of the full lengthtransferrin protein. In additional or alternative embodiments, the DDppis fused to or complexed with a transferrin binding domain that bindstransferrin when administered in vivo.

In some embodiments, the DDpp is fused to, or chemically conjugated to aproline-alanine-serine multimer (PASylation; XL-Protein GmbH), anon-exact repeat peptide sequence (XTENylation, rPEG), a homopolymer ofglycine residues (HAPylation), elastin-like repeat(s) sequences(ELPylation; see for example, U.S. Pat. Appl. No. 61/442,106, thecontents of which is herein incorporated by reference in its entirety),an artificial GLK (GLK fusion; Huang et al., Eur. J. Pharm. Biopharm.72: 435-41 (2010)), or a CTP peptide from human CG beta-subunit (CTPfusion).

Additional DDpp Fusion Proteins

In some embodiments, the DDpp fusion protein specifically binds BCMA,CD123, CS1, HER2, AFP, and/or AFP p26, and further binds adisease-related antigen. The disease-related antigen can be an antigencharacteristic of a cancer, and/or of a particular cell type (e.g., ahyperproliferative cell), and/or of a pathogen (e.g., a bacterial cell(e.g., tuberculosis, smallpox, and anthrax), a virus (e.g., HIV), aparasite (e.g., malaria and leishmaniosis), a fungal infection, a mold,a mycoplasm, a prion antigen, or an antigen associated with a disorderof the immune system. In further embodiments, the DDpp fusion protein isconjugated to a therapeutic or cytotoxic agent.

In an additional embodiment, a DDpp fusion protein is linked to one ormore chemical moieties (e.g., labels) that facilitate detection,multimerization, binding with an interaction partner, orcharacterization of DDpp activity. An exemplary chemical moiety isbiotin. Other moieties suitable for conjugation to the DDpp include, butare not limited to, a photosensitizer, a dye, a fluorescence dye, aradionuclide, a radionuclide-containing complex, an enzyme, a toxin, anda cytotoxic agent. Photosensitizers include, e.g., Photofrin, Visudyne,Levulan, Foscan, Metvix, Hexvix®, Cysview™, Laserphyrin, Antrin,Photochlor, Photosens, Photrex, Lumacan, Cevira, Visonac, BF-200 ALA,and Amphinex. In additional embodiments, a His tag, a FLAG tag, a streptag, or a myc tag is conjugated to the DDpp.

In another embodiment, the DDpp fusion protein comprises a DD that bindsBCMA, CD123, CS1, HER2, AFP, AFP p26, or a fragment thereof, and furtherbinds a peptide tag present on a target of interest. Such peptide tagsprovide a useful means by which to detect and/or attach targets ofinterest containing the peptide tags. In one embodiment, the DDpp fusionprotein specifically binds a peptide tag selected from the group: ahexahistidyl (His6) tag, a myc tag or a FLAG tag. Other peptide tags aredescribed herein or otherwise known in the art.

DDpp Fusion Proteins with an Epitope Tag

In some embodiments, the DDpp fusion protein comprises a peptide epitopetag. In some embodiments, the peptide tag is selected from the groupconsisting of a hexahistidyl (His6) tag, a myc tag and a FLAG tag. Inadditional embodiments, peptide tags include, but are not limited to,avitag (allows biotinylation of the tag and isolation withstreptavidin), calmodulin, E-tag, hemagglutinin (HA), S-tag, SBP-tag,softag 1, streptavidin, tetra or poly-cysteine, V5, VSV, and Xpress tag.Additionally polyhistidyl tags (other than 6 residues) can be used. Inadditional embodiments, covalent peptide tags, protein tags, and thelike can be used. Covalent peptide tags include, but are not limited to,isopeptag (covalently binds pilinC protein), Spytag (covalently binds tothe SpyCatcher protein), and Snooptag (covalently binds to theSnoopCatcher protein). In still additional embodiments, protein tags,including but not limited to biotin carboxyl carrier protein (BCCP),glutathione-s-transferase, green fluorescent protein (or otherfluorophore), Halo tag, Nus tag, thioredoxin, and Fc tags may optionallybe used. In still additional embodiments, multiple types of tags may beused. In still additional embodiments, no tag is used. In stilladditional embodiments, the DDpp fusion protein comprises a removabletag. Any combination of extracellular, transmembrane and intracellulardomains disclosed herein may be used, depending on the embodiment.

DDpp Linkers

The terms “linker” and spacer are used interchangeably herein to referto a peptide or other chemical linkage that functions to link otherwiseindependent functional domains. In one embodiment, a linker in a DDpp islocated between a DDpp and another polypeptide component containing anotherwise independent functional domain. Suitable linkers for couplingthe two or more linked DDpp will be clear to the persons skilled in theart and may generally be any linker used in the art to link peptides,proteins or other organic molecules. In particular embodiments, such alinker is suitable for constructing proteins or polypeptides that areintended for pharmaceutical use.

Suitable linkers for operably linking a DDpp and an additional componentof a DDpp fusion protein in a single-chain amino acid sequence includebut are not limited to, polypeptide linkers such as glycine linkers,serine linkers, mixed glycine/serine linkers, glycine- and serine-richlinkers or linkers composed of largely polar polypeptide fragments.

In one embodiment, the linker is made up of a majority of amino acidsselected from glycine, alanine, proline, asparagine, glutamine, andlysine. In one embodiment, the linker is made up of a majority of aminoacids selected from glycine, alanine, proline, asparagine, asparticacid, threonine, glutamine, and lysine. In one embodiment, the DDppfusion protein linker is made up of one or more of the amino acidsselected from glycine, alanine, proline, asparagine, glutamine, andlysine. In one embodiment, the DDpp fusion protein linker is made up ofone or more of the amino acids selected from glycine, alanine, proline,asparagine, aspartic acid, threonine, glutamine, and lysine. In anotherembodiment, the DDpp fusion protein linker is made up of a majority ofamino acids that are sterically unhindered. In another embodiment, alinker in which the majority of amino acids are glycine, serine, and/oralanine. In some embodiments, the peptide linker is selected frompolyglycines (such as (Gly)₅ (SEQ ID NO: 975), and (Gly)₈ (SEQ ID NO:976), poly(Gly-Ala), and polyalanines. In some embodiments, the peptidelinker contains the sequence of Gly-Gly-Gly-Gly-Thr-Gly-Gly-Gly-Gly-Ser(SEQ ID NO: 4). In some embodiments, the peptide linker contains thesequence of Gly-Gly-Gly-Gly-Asp-Gly-Gly-Gly-Gly-Ser (SEQ ID NO: 5).

In one embodiment, a DDpp fusion comprises a DDpp directly attached(i.e., without a linker) to another component of the DDpp fusionprotein. In one embodiment, a DDpp fusion comprises at least 2, at least3, at least 4, DDpp directly attached to another component of the DDppfusion.

In another embodiment, a DDpp can be operably linked to anothercomponent of a DDpp fusion protein through a linker. DDpp fusionproteins can contain a single linker, multiple linkers, or no linkers.In one embodiment, a DDpp fusion comprises a DDpp operably linked toanother component of the DDpp fusion protein through a linker peptide.In one embodiment, a DDpp fusion comprises at least 2, 3, 4, or 5 DDoperably linked to another component of the DDpp fusion protein througha linker peptide.

Linkers can be of any size or composition so long as they are able tooperably link a DDpp in a manner that enables the DDpp to bind a targetof interest such as BCMA, CD123, CS1, HER2, AFP, or AFP p26. In someembodiments, linkers are about 1 to about 100 amino acids, about 1 to 50amino acids, about 1 to 20 amino acids, about 1 to 15 amino acids, about1 to 10 amino acids, about 1 to 5 amino acids, about 2 to 20 aminoacids, about 2 to 15 amino acids, about 2 to 10 amino acids, or about 2to 5 amino acids. It should be clear that the length, the degree offlexibility and/or other properties of the linker(s) may have someinfluence on the properties of the provided DD containing proteins,including but not limited to the affinity, specificity or avidity for atarget of interest, or for one or more other target proteins ofinterest. When two or more linkers are used in the DDpp fusion proteins,these linkers may be the same or different. In the context anddisclosure provided herein, a person skilled in the art will be able toroutinely determine the optimal linker composition and length for thepurpose of operably linking a DDpp and other components of a DDpp fusionprotein.

The linker can also be a non-peptide linker such as an alkyl linker, ora PEG linker. For example, alkyl linkers such as —NH—(CH2)s-C(0)-,wherein s=2-20 can be used. These alkyl linkers may further besubstituted by any non-sterically hindering group such as lower alkyl(e.g., C1-C6) lower acyl, halogen (e.g., Cl, Br), CN, NH2, phenyl, etc.An exemplary non-peptide linker is a PEG linker. In certain embodiments,the PEG linker has a molecular weight of about 100 to 5000 kDa, or about100 to 500 kDa.

Suitable linkers for coupling DDpp fusion protein components by chemicalcross-linking include, but are not limited to, homo-bifunctionalchemical cross-linking compounds such as glutaraldehyde, imidoesterssuch as dimethyl adipimidate (DMA), dimethyl suberimidate (DMS) anddimethyl pimelimidate (DMP) or N-hydroxysuccinimide (NHS) esters such asdithiobis(succinimidylpropionate) (DSP) and dithiobis(sulfosuccini-midylpropionate) (DTSSP). Examples of suitable linkers forcoupling DDpp fusion protein components of hetero-bifunctional reagentsfor cross-linking include, but are not limited to, cross-linkers withone amine-reactive end and a sulfhydryl-reactive moiety at the otherend, or with a NHS ester at one end and an SH-reactive group (e.g., amaleimide or pyridyl).

In additional embodiments, one or more of the linkers in the DDpp fusionprotein is cleavable. Examples of cleavable linkers include, withoutlimitation, a peptide sequence recognized by proteases (in vitro or invivo) of varying type, such as Tev, thrombin, factor Xa, plasmin (bloodproteases), metalloproteases, cathepsins (e.g., GFLG, etc.), andproteases found in other corporeal compartments.

In one embodiment, the linker is a “cleavable linker” that facilitatesthe release of a DDpp or cytotoxic agent in a cell. For example, anacid-labile linker (e.g., hydrazone), protease-sensitive (e.g.,peptidase-sensitive) linker, photolabile linker, dimethyl linker ordisulfide-containing linker (Chari, Can. Res. 52: 127-131 (1992); U.S.Pat. No. 5,208,020; U.S. Appl. Pub. No. 20090110753; the contents ofeach of which is herein incorporated by reference in its entirety) canbe used wherein it is desirable that the covalent attachment between aDDpp or a cytotoxic agent and the fusion partner is intracellularlycleaved when the composition is internalized into the cell. The terms“intracellularly cleaved” and “intracellular cleavage” refer to ametabolic process or reaction inside a cell on an DDpp drug conjugatewhereby the covalent attachment, i.e., linked via a linker between theDDpp and cytotoxic agent, DDpp and fusion partner, or between two DDppis broken, resulting in the free DDpp and/or cytotoxic agent dissociatedinside the cell.

Linker optimization can be evaluated using techniques described hereinand/or otherwise known in the art. In some embodiments, linkers do notdisrupt the ability of a DDpp to bind a target molecule and/or anotherDDpp fusion protein component such as an antibody domain or fragment tobind an antigen.

DDpp as Chemical Conjugates

DDpp fusion proteins that promote specific binding to targets ofinterest can be chemically conjugated with a variety of compound such asfluorescent dyes, radioisotopes, chromatography compositions (e.g.,beads, resins, gels, etc.) and chemotherapeutic agents. DDpp conjugateshave uses that include but are not limited to diagnostic, analytic,manufacturing and therapeutic applications.

The inherent lack of cysteines in the DD sequence provides theopportunity for introduction of unique cysteines for purposes ofsite-specific conjugation.

In some embodiments, the DDpp (e.g., a DDpp fusion protein) contains atleast one reactive residue. Reactive residues are useful, for example,as sites for the attachment of conjugates such as chemotherapeuticdrugs. The reactive residue can be, for example, a cysteine, a lysine,or another reactive residue. Thus, a cysteine can be added to a DDpp ateither the N- or C-terminus, or within the DDpp sequence. A cysteine canbe substituted for another amino acid in the sequence of a DDpp. Inaddition, a lysine can be added to a DDpp at either end or within theDDpp sequence and/or a lysine can be substituted for another amino acidin the sequence of a DDpp. In one embodiment, a reactive residue (e.g.,cysteine, lysine, etc.) is located in a loop sequence of a DD (e.g.,amino aicd residues 22-24 and 46-49 of SEQ ID NOS: 11-949, and 950). Inone embodiment, a reactive residue is located between components of aDDpp fusion, e.g., in a linker located between a DDpp and othercomponent of a DDpp fusion protein. The reactive residue (e.g.,cysteine, lysine, etc.) can also be located within the sequence of aDDpp, or other component of the DDpp fusion protein. In one embodiment,a DDpp or a DDpp fusion protein comprises at least one, at least two, atleast three reactive residues. In one embodiment, a DDpp such as a DDppfusion protein comprises at least one, at least two, or at least three,cysteine residues.

BCMA-Binding DDpp

In some embodiments, a DD of the DDpp specifically binds BCMA. Infurther embodiments, a DD of the DDpp specifically binds BCMA having anamino acid sequence consisting of SEQ ID NO: 7. In some embodiments, theDDpp comprises an amino acid sequence selected from the group consistingof SEQ ID NO: 11-305, and 306. In other embodiments, the BCMA-bindingDDpp comprises a variant of an amino acid sequence selected from thegroup consisting of SEQ ID NO: 11-305, and 306.

In some embodiments, the BCMA-binding DDpp comprises multipletarget-binding domains that bind a single target (e.g., dimers, trimers,etc.). In some embodiments, the DDpp comprises 2, 3, 4, 5, or more than5, DD that specifically bind BCMA and that have an amino acid sequenceselected from the group consisting of SEQ ID NO: 11-305, and 306. Insome embodiments, the DDpp comprises 2, 3, 4, 5, or more than 5, DD thathave the same sequence. In some embodiments, the DDpp comprises 2, 3, 4,5 or more than 5, DD that specifically bind to different epitopes ofBCMA and that have an amino acid sequence selected from the groupconsisting of SEQ ID NO: 11-305, and 306. In some embodiments, the DDppcomprises a DD that specifically binds BCMA and further comprises 2, 3,4, 5 or more than 5, additional different DDs or target-binding bindingdomains (e.g., scFvs) that specifically bind to BCMA or a differenttarget antigen. In some embodiments, the DDpp comprises a DD thatspecifically binds BCMA (e.g., a DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 11-305, and 306) andfurther comprises one or more additional DDs or other target-bindingbinding domains that bind one or more antigens expressed on the surfaceof a B cell. In some embodiments, the DDpp comprises a DD thatspecifically binds BCMA e.g., a DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 11-305, and 306) andfurther comprises one or more additional DDs or other target-bindingbinding domains that bind one or more cancer antigens. In someembodiments, the DDpp comprises a DD that specifically binds BCMA (e.g.,a DD having an amino acid sequence selected from the group consisting ofSEQ ID NO: 11-305, and 306) and specifically binds 2, 3, 4, 5, or morethan 5, different targets. In further embodiments, the DDpp comprises aDD that specifically binds BCMA (e.g., a DD having an amino acidsequence selected from the group consisting of SEQ ID NO: 11-305, and306) and specifically binds 2, 3, 4, 5, or more than 5, different cancerantigens. In some embodiments, the DDpp comprises a DD that specificallybinds BCMA (e.g., a DD having an amino acid sequence selected from thegroup consisting of SEQ ID NO: 11-305, and 306) and specifically binds2, 3, 4, 5, or more than 5, different cancer antigens expressed on thesurface of a cancer cell. In some embodiments, the DDpp comprises a DDthat specifically binds BCMA (e.g., a DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 11-305, and 306) andspecifically binds 2, 3, 4, 5, or more than 5, cancer antigens expressedon the surface of different cancer cells.

In some embodiments, the DDpp comprises a variant of a BCMA-binding DDdisclosed herein (reference DD) that retains the ability to specificallybind BCMA. In some embodiments, the sequence of the BCMA-binding DDvariant contains 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions compared to a referenceBCMA-binding DD having an amino acid sequence selected from the groupconsisting of SEQ ID NO: 11-305, and 306. In some embodiments, thesequence of the BCMA-binding DD variant contains 1, 2, 3, 4, 5, 6, 7, 8,9, or 10, 1-3, 1-5, or 1-10, conservative substitutions compared to areference BCMA-binding DD having an amino acid sequence selected fromthe group consisting of SEQ ID NO: 11-305, and 306. In some embodiments,the sequence of the BCMA-binding DD variant contains 1, 2, 3, 4, 5, 6,7, 8, 9, or 10, 1-3, 1-5, or 1-10, non-conservative substitutionscompared to a reference BCMA-binding DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 11-305, and 306.

In some embodiments, the sequence of the BCMA-binding DD variantcontains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions in positionscorresponding to amino acid residues 1-22, 29-46, and 52-72, of areference BCMA-binding DD having an amino acid sequence selected fromthe group consisting of SEQ ID NO: 11-305, and 306. In some embodiments,the sequence of the BCMA-binding DD variant contains a total of 1, 2, 3,4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10, conservative substitutionsin positions corresponding to amino acid residues 1-22, 29-46, and52-72, of a reference BCMA-DD having an amino acid sequence selectedfrom the group consisting of SEQ ID NO: 11-305, and 306. In someembodiments, the sequence of the BCMA-binding DD variant contains atotal of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,non-conservative substitutions in positions corresponding to amino acidresidues 1-22, 29-46, and 52-72, of a reference BCMA-binding DD havingan amino acid sequence selected from the group consisting of SEQ ID NO:11-305, and 306.

In some embodiments, the sequence of the BCMA-binding DD variantcontains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions in positionscorresponding to amino acid residues: 2-6, 8-10, 12, 13, 15-17, 19, 20,29, 30, 32-34, 36, 37, 39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and68-70, of a reference BCMA-binding DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 11-305, and 306. Insome embodiments, the sequence of the BCMA-binding DD variant contains atotal of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative substitutions in positions corresponding to amino acidresidues: 2-6, 8-10, 12, 13, 15-17, 19, 20, 29, 30, 32-34, 36, 37,39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and 68-70, of a reference DDhaving an amino acid sequence selected from the group consisting of SEQID NO: 11-305, and 306. In some embodiments, the sequence of theBCMA-binding DD variant contains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9,or 10, 1-3, 1-5, or 1-10, non-conservative substitutions in positionscorresponding to amino acid residues: 2-6, 8-10, 12, 13, 15-17, 19, 20,29, 30, 32-34, 36, 37, 39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and68-70, of a reference DD having an amino acid sequence selected from thegroup consisting of SEQ ID NO: 11-305, and 306.

In some embodiments, the disclosure provides a BCMA-binding DDpp thatcompletely or partially (e.g., overlap with an epitope) block binding ofa reference DD to BCMA, wherein the reference DD has an amino acidsequence selected from SEQ ID NO: 11-305, and 306. In other embodiments,the disclosure provides BCMA-binding DDpp that bind to the same epitopeof BCMA as a a reference DD consisting of an amino acid sequenceselected from SEQ ID NO: 11-305, and 306.

In some embodiments, the DDpp is a fusion protein comprising a DD thatspecifically binds BCMA. In some embodiments, the DD specifically bindsa BCMA protein having an amino acid sequence consisting of SEQ ID NO: 7.In some embodiments, the BCMA-binding DDpp fusion protein comprises anamino acid sequence selected from the group consisting of SEQ ID NO:11-305, and 306. In other embodiments, the DDpp comprises a variant ofan amino acid sequence selected from the group consisting of SEQ ID NO:11-305, and 306. In some embodiments, the DDpp fusion protein comprisesa full-length antibody or a portion (fragment) of an antibody. In someembodiments, the DDpp fusion protein comprises a full length IgGantibody (e.g., IgG1, IgG2, IgG2, or IgG4). In further embodiments, theDDpp fusion protein comprises a full length antibody that specificallybinds a cancer antigen. In further embodiments, the DDpp comprises acommercially approved therapeutic antibody (e.g., rituximab, ofatumumab,ocrelizumab, veltuzumab, MEDI-551, epratuzumab, belimumab, tabalumab,AMG-557, MEDI-570, and NN882). In other embodiments, the BCMA-bindingDDpp is an Fc fusion protein. In further embodiments, the Fc proteincomprises a variant human Fc domain.

In some embodiments, the DDpp fusion protein comprises a BCMA-binding DDoperably linked to a serum protein. In some embodiments, the DDpp fusionprotein comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 11-305, and 306. In other embodiments, theBCMA-binding DDpp fusion protein comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 11-305, and306. In further embodiments, the DDpp fusion protein comprises humanserum albumin or a fragment thereof. In some embodiments, the DDppfusion protein comprises AFP or AFP p26, or a fragment thereof. In someembodiments, the DDpp fusion protein comprises AFP (e.g., SEQ ID NO: 9),or a fragment thereof. In other embodiments, the DDpp fusion proteincomprises AFP p26 (SEQ ID NO: 10), or a fragment thereof. In someembodiments, the DDpp fusion protein comprises a polypeptide having thesequence of SEQ ID NO: 10, 968, 969, 970, 971, 972, 973, or 974. In someembodiments, the DDpp fusion protein contains a fragment of a serumprotein or an antigenic fragment of a serum protein (e.g., AFP, and AFPp26). In some embodiments, the DDpp fusion protein comprises a fragmentconsisting of 5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500, 10-400,10-300, 10-200, 10-100, or 10-50 amino acids of a serum protein.

In some embodiments, the BCMA-binding DDpp fusion protein comprises theextracellular domain of a receptor or a fragment thereof. In someembodiments, the DDpp fusion protein comprises a DD that comprises anamino acid sequence selected from the group consisting of SEQ ID NO:11-305, and 306. In other embodiments, the BCMA-binding DDpp fusionprotein comprises a variant of an amino acid sequence selected from thegroup consisting of SEQ ID NO: 11-305, and 306. In further embodiments,the BCMA-binding DDpp fusion protein comprises the extracellular domainof CD123 (SEQ ID NO: 8), or a fragment thereof. In some embodiments, theBCMA-binding DDpp fusion protein comprises the extracellular domain ofof a receptor selected from the group consisting of: CD19, CD20, CD22,HVEM, BTLA, DR3, CD37; TSLPR, IL7R, and gp96, or a fragment thereof.

In some embodiments, the BCMA-binding DDpp fusion protein contains afragment consisting of 5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500,10-400, 10-300, 10-200, 10-100, or 10-50 amino acids of an extracellulardomain, of a cell surface receptor. In some embodiments, the DDpp fusionprotein contains a fragment of an extracellular domain of BCMA (SEQ IDNO: 7) or CD123 (SEQ ID NO: 8). In some embodiments, the DDpp fusionprotein contains a fragment of an extracellular domain of BCMA (SEQ IDNO: 7), CD123 (SEQ ID NO: 8), or CS1 (SEQ ID NO: 965). In someembodiments, the DDpp contains a fragment of an extracellular domain, ofa receptor selected from the group consisting of: CD19, CD20, CD22,HVEM, BTLA, DR3, CD37; TSLPR, IL7R, and gp96.

In additional embodiments, the BCMA-binding DDpp fusion proteincomprises an intracellular protein (e.g., a nuclear protein) or afragment thereof. In some embodiments, the DDpp fusion protein comprisesa DD that comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 11-305, and 306. In other embodiments, theBCMA-binding DDpp fusion protein comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 11-305, and306. In some embodiments, the BCMA-binding DDpp fusion protein comprisesa fragment consisting of 5-500, 5-400, 5-300, 5-200, 5-100, 5-50,10-500, 10-400, 10-300, 10-200, 10-100, or 10-50 amino acid residues ofan intracellular protein (e.g., a nuclear protein).

CD123-Binding DDpp

In some embodiments, a DD of the DDpp specifically binds CD123. Infurther embodiments, the DD specifically binds CD123 having an aminoacid sequence consisting of SEQ ID NO: 8. In some embodiments, the DDppcomprises an amino acid sequence selected from the group consisting ofSEQ ID NO: SEQ ID NO: 307-739, and 740. In other embodiments, the DDppcomprises a variant of an amino acid sequence selected from the groupconsisting of SEQ ID NO: SEQ ID NO: 307-739, and 740.

In some embodiments, the CD123-binding DDpp comprises multipletarget-binding domains that bind a single target (e.g., dimers, trimers,etc.). In some embodiments, the DDpp comprises 2, 3, 4, 5, or more than5, DD that specifically bind CD123 and that have an amino acid sequenceselected from the group consisting of SEQ ID NO: 307-739, and 740. Insome embodiments, the DDpp comprises 2, 3, 4, 5, or more than 5, DD thathave the same sequence. In some embodiments, the DDpp comprises 2, 3, 4,5 or more than 5, DD that specifically bind to different epitopes ofCD123 and that have an amino acid sequence selected from the groupconsisting of SEQ ID NO: 307-739, and 740. In some embodiments, the DDppcomprises a DD that specifically binds CD123 and further comprises 2, 3,4, 5 or more than 5, additional different DDs or target-binding bindingdomains (e.g., scFvs) that specifically bind to CD123 or a differenttarget antigen. In some embodiments, the DDpp comprises a DD thatspecifically binds CD123 (e.g., a DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 307-739, and 740) andfurther comprises one or more additional DDs or other target-bindingbinding domains that bind one or more antigens expressed on the surfaceof a B cell. In some embodiments, the DDpp comprises a DD thatspecifically binds CD123 e.g., a DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 307-739, and 740) andfurther comprises one or more additional DDs or other target-bindingbinding domains that bind one or more cancer antigens. In someembodiments, the DDpp comprises a DD that specifically binds CD123(e.g., a DD having an amino acid sequence selected from the groupconsisting of SEQ ID NO: 307-739, and 740) and specifically binds 2, 3,4, 5, or more than 5, different targets. In further embodiments, theDDpp comprises a DD that specifically binds CD123 (e.g., a DD having anamino acid sequence selected from the group consisting of SEQ ID NO:307-739, and 740) and specifically binds 2, 3, 4, 5, or more than 5,different cancer antigens. In some embodiments, the DDpp comprises a DDthat specifically binds CD123 (e.g., a DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 307-739, and 740) andspecifically binds 2, 3, 4, 5, or more than 5, different cancer antigensexpressed on the surface of a cancer cell. In some embodiments, the DDppcomprises a DD that specifically binds CD123 (e.g., a DD having an aminoacid sequence selected from the group consisting of SEQ ID NO: 307-739,and 740) and specifically binds 2, 3, 4, 5, or more than 5, cancerantigens expressed on the surface of different cancer cells.

In some embodiments, the DDpp comprises a variant of a CD123-binding DDdisclosed herein (reference DD) that retains the ability to specificallybind CD123. In some embodiments, the sequence of the CD123-binding DDvariant contains 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions compared to a referenceCD123-binding DD having an amino acid sequence selected from the groupconsisting of SEQ ID NO: 307-739, and 740. In some embodiments, thesequence of the CD123-binding DD variant contains 1, 2, 3, 4, 5, 6, 7,8, 9, or 10, 1-3, 1-5, or 1-10, conservative substitutions compared to areference CD123-binding DD having an amino acid sequence selected fromthe group consisting of SEQ ID NO: 307-739, and 740. In someembodiments, the sequence of the CD123-binding DD variant contains 1, 2,3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10, non-conservativesubstitutions compared to a reference CD123-binding DD having an aminoacid sequence selected from the group consisting of SEQ ID NO: 307-739,and 740.

In some embodiments, the sequence of the CD123-binding DD variantcontains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions in positionscorresponding to amino acid residues 1-22, 29-46, and 52-72, of areference CD123-binding DD having an amino acid sequence selected fromthe group consisting of SEQ ID NO: 4307-739, and 740. In someembodiments, the sequence of the CD123-binding DD variant contains atotal of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative substitutions in positions corresponding to amino acidresidues 1-22, 29-46, and 52-72, of a reference CD123-DD having an aminoacid sequence selected from the group consisting of SEQ ID NO: 307-739,and 740. In some embodiments, the sequence of the CD123-binding DDvariant contains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5,or 1-10, non-conservative substitutions in positions corresponding toamino acid residues 1-22, 29-46, and 52-72, of a reference CD123-bindingDD having an amino acid sequence selected from the group consisting ofSEQ ID NO: 307-739, and 740.

In some embodiments, the sequence of the CD123-binding DD variantcontains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions in positionscorresponding to amino acid residues: 2-6, 8-10, 12, 13, 15-17, 19, 20,29, 30, 32-34, 36, 37, 39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and68-70, of a reference CD123-binding DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 307-739, and 740. Insome embodiments, the sequence of the CD123-binding DD variant containsa total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative substitutions in positions corresponding to amino acidresidues: 2-6, 8-10, 12, 13, 15-17, 19, 20, 29, 30, 32-34, 36, 37,39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and 68-70, of a reference DDhaving an amino acid sequence selected from the group consisting of SEQID NO: 307-739, and 740. In some embodiments, the sequence of theCD123-binding DD variant contains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9,or 10, 1-3, 1-5, or 1-10, non-conservative substitutions in positionscorresponding to amino acid residues: 2-6, 8-10, 12, 13, 15-17, 19, 20,29, 30, 32-34, 36, 37, 39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and68-70, of a reference DD having an amino acid sequence selected from thegroup consisting of SEQ ID NO: 307-739, and 740.

In some embodiments, the disclosure provides CD123-binding DDpp thatcompletely or partially (e.g., overlap with an epitope) block binding ofa reference DD to CD123, wherein the reference DD has an amino acidsequence selected from SEQ ID NO: 307-739, and 740. In otherembodiments, the disclosure provides CD123-binding DDpp that bind to thesame epitope of CD123 as a a reference DD consisting of an amino acidsequence selected from SEQ ID NO: 307-739, and 740.

In some embodiments, the DDpp is a fusion protein comprising a DD thatspecifically binds CD123. In some embodiments, a DD of the DDpp fusionprotein specifically binds CD123 having an amino acid sequenceconsisting of of SEQ ID NO: 8. In some embodiments, the DDpp comprisesan amino acid sequence selected from the group consisting of SEQ ID NO:307-739, and 740. In other embodiments, the DDpp comprises a variant ofan amino acid sequence selected from the group consisting of SEQ ID NO:307-739, and 740. In some embodiments, the DDpp fusion protein comprisesa full-length antibody or a portion (fragment) of an antibody. In someembodiments, the DDpp fusion protein comprises a full length IgGantibody (e.g., IgG1, IgG2, IgG2, or IgG4). In further embodiments, theDDpp fusion protein comprises a full length antibody that specificallybinds a cancer antigen. In further embodiments, the DDpp comprises acommercially approved therapeutic antibody (e.g., rituximab, ofatumumab,ocrelizumab, veltuzumab, MEDI-551, epratuzumab, belimumab, tabalumab,AMG-557, MEDI-570, and NN882). In other embodiments, the CD123-bindingDDpp is an Fc fusion protein.

In some embodiments, the DDpp is a fusion protein comprising aCD123-binding DD operably linked to a serum protein. In someembodiments, the CD123-binding DDpp fusion protein comprises an aminoacid sequence selected from the group consisting of SEQ ID NO: 307-739,and 740. In other embodiments, the CD123-binding DDpp fusion proteincomprises a variant of an amino acid sequence selected from the groupconsisting of SEQ ID NO: 307-739, and 740. In some embodiments, theCD123-binding DDpp fusion protein comprises all or a portion of humanserum albumin. In some embodiments, the DDpp fusion protein comprisesAFP (SEQ ID NO: 9), or a fragment thereof. In some embodiments, theCD123-binding DDpp fusion protein comprises AFP p26 (SEQ ID NO: 10), ora fragment thereof. In some embodiments, the CD123-bindng DDpp fusionprotein comprises a polypeptide having the sequence of SEQ ID NO: 10,968, 969, 970, 971, 972, 973, or 974. In some embodiments, the DDppfusion protein contains a fragment of a serum protein or an antigenicfragment of a serum protein (e.g., AFP, and AFP p26). In someembodiments, the DDpp fusion protein comprises a fragment consisting of5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500, 10-400, 10-300, 10-200,10-100, or 10-50 amino acids of a serum protein.

In some embodiments, the CD123-binding DDpp fusion protein comprises theextracellular domain of a receptor or a fragment thereof. In someembodiments, the DDpp fusion protein comprises a DD that comprises anamino acid sequence selected from the group consisting of SEQ ID NO:307-739, and 740. In other embodiments, the CD123-binding DDpp fusionprotein comprises a variant of an amino acid sequence selected from thegroup consisting of SEQ ID NO: 307-739, and 740. In further embodiments,the CD123-binding DDpp fusion protein comprises the extracellular domainof CD123 (SEQ ID NO: 8), or a fragment thereof. In some embodiments, theCD123-binding DDpp fusion protein comprises the extracellular domain ofof a receptor selected from the group consisting of: CD19, CD20, CD22,HVEM, BTLA, DR3, CD37; TSLPR, IL7R, and gp96, or a fragment thereof.

In some embodiments, the CD123-binding DDpp fusion protein contains afragment consisting of 5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500,10-400, 10-300, 10-200, 10-100, or 10-50 amino acids of an extracellulardomain, of a cell surface receptor. In some embodiments, the DDpp fusionprotein contains a fragment of an extracellular domain of BCMA (SEQ IDNO: 7). In some embodiments, the DDpp fusion protein contains a fragmentof an extracellular domain of CD123 (SEQ ID NO: 8). In some embodiments,the DDpp fusion protein contains a fragment of an extracellular domainof CS1 (SEQ ID NO: 965). In some embodiments, the DDpp contains afragment of an extracellular domain, of a receptor selected from thegroup consisting of: CD19, CD20, CD22, HVEM, BTLA, DR3, CD37; TSLPR,IL7R, and gp96.

In additional embodiments, the CD123-binding DDpp fusion proteincomprises an intracellular protein (e.g., a nuclear protein) or afragment thereof. In some embodiments, the DDpp fusion protein comprisesa DD that comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 307-739, and 740. In other embodiments, theCD123-binding DDpp fusion protein comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 307-739, and740. In some embodiments, the CD123-binding DDpp fusion proteincomprises a fragment consisting of 5-500, 5-400, 5-300, 5-200, 5-100,5-50, 10-500, 10-400, 10-300, 10-200, 10-100, or 10-50 amino acidresidues of an intracellular protein (e.g., a nuclear protein).

CS1-Binding DDpp

In some embodiments, a DD of the DDpp specifically binds CS1. In furtherembodiments, the DD specifically binds CS1 having an amino acid sequenceconsisting of SEQ ID NO: 965. In some embodiments, the DDpp comprises anamino acid sequence selected from the group consisting of SEQ ID NO:896-909, and 910. In other embodiments, the DDpp comprises a variant ofan amino acid sequence selected from the group consisting of SEQ ID NO:896-909, and 910.

In some embodiments, the CS1-binding DDpp comprises multipletarget-binding domains that bind a single target (e.g., dimers, trimers,etc.). In some embodiments, the DDpp comprises 2, 3, 4, 5, or more than5, DD that specifically bind CS1 and that have an amino acid sequenceselected from the group consisting of SEQ ID NO: 896-909, and 910. Insome embodiments, the DDpp comprises 2, 3, 4, 5, or more than 5, DD thathave the same sequence. In some embodiments, the DDpp comprises 2, 3, 4,5 or more than 5, DD that specifically bind to different epitopes of CS1and that have an amino acid sequence selected from the group consistingof SEQ ID NO: 896-909, and 910. In some embodiments, the DDpp comprisesa DD that specifically binds CS1 and further comprises 2, 3, 4, 5 ormore than 5, additional different DDs or target-binding binding domains(e.g., scFvs) that specifically bind to CS1 or a different targetantigen. In some embodiments, the DDpp comprises a DD that specificallybinds CS1 (e.g., a DD having an amino acid sequence selected from thegroup consisting of SEQ ID NO: 896-909, and 910) and further comprisesone or more additional DDs or other target-binding binding domains thatbind one or more antigens expressed on the surface of a B cell. In someembodiments, the DDpp comprises a DD that specifically binds CS1 e.g., aDD having an amino acid sequence selected from the group consisting ofSEQ ID NO: 896-909, and 910) and further comprises one or moreadditional DDs or other target-binding binding domains that bind one ormore cancer antigens. In some embodiments, the DDpp comprises a DD thatspecifically binds CS1 (e.g., a DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 896-909, and 910) andspecifically binds 2, 3, 4, 5, or more than 5, different targets. Infurther embodiments, the DDpp comprises a DD that specifically binds CS1(e.g., a DD having an amino acid sequence selected from the groupconsisting of SEQ ID NO: 896-909, and 910) and specifically binds 2, 3,4, 5, or more than 5, different cancer antigens. In some embodiments,the DDpp comprises a DD that specifically binds CS1 (e.g., a DD havingan amino acid sequence selected from the group consisting of SEQ ID NO:896-909, and 910) and specifically binds 2, 3, 4, 5, or more than 5,different cancer antigens expressed on the surface of a cancer cell. Insome embodiments, the DDpp comprises a DD that specifically binds CS1(e.g., a DD having an amino acid sequence selected from the groupconsisting of SEQ ID NO: 896-909, and 910) and specifically binds 2, 3,4, 5, or more than 5, cancer antigens expressed on the surface ofdifferent cancer cells.

In some embodiments, the DDpp comprises a variant of a CS1-binding DDdisclosed herein (reference DD) that retains the ability to specificallybind CS1. In some embodiments, the sequence of the CS1-binding DDvariant contains 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions compared to a referenceCS1-binding DD having an amino acid sequence selected from the groupconsisting of SEQ ID NO: 896-909, and 910. In some embodiments, thesequence of the CS1-binding DD variant contains 1, 2, 3, 4, 5, 6, 7, 8,9, or 10, 1-3, 1-5, or 1-10, conservative substitutions compared to areference CS1-binding DD having an amino acid sequence selected from thegroup consisting of SEQ ID NO: 896-909, and 910. In some embodiments,the sequence of the CS1-binding DD variant contains 1, 2, 3, 4, 5, 6, 7,8, 9, or 10, 1-3, 1-5, or 1-10, non-conservative substitutions comparedto a reference CS1-binding DD having an amino acid sequence selectedfrom the group consisting of SEQ ID NO: 896-909, and 910.

In some embodiments, the sequence of the CS1-binding DD variant containsa total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions in positionscorresponding to amino acid residues 1-22, 29-46, and 52-72, of areference CS1-binding DD having an amino acid sequence selected from thegroup consisting of SEQ ID NO: 896-909, and 910. In some embodiments,the sequence of the CS1-binding DD variant contains a total of 1, 2, 3,4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10, conservative substitutionsin positions corresponding to amino acid residues 1-22, 29-46, and52-72, of a reference CS1-DD having an amino acid sequence selected fromthe group consisting of SEQ ID NO: 896-909, and 910. In someembodiments, the sequence of the CS1-binding DD variant contains a totalof 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10, non-conservativesubstitutions in positions corresponding to amino acid residues 1-22,29-46, and 52-72, of a reference CS1-binding DD having an amino acidsequence selected from the group consisting of SEQ ID NO: 896-909, and910.

In some embodiments, the sequence of the CS1-binding DD variant containsa total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions in positionscorresponding to amino acid residues: 2-6, 8-10, 12, 13, 15-17, 19, 20,29, 30, 32-34, 36, 37, 39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and68-70, of a reference CS1-binding DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 896-909, and 910. Insome embodiments, the sequence of the CS1-binding DD variant contains atotal of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative substitutions in positions corresponding to amino acidresidues: 2-6, 8-10, 12, 13, 15-17, 19, 20, 29, 30, 32-34, 36, 37,39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and 68-70, of a reference DDhaving an amino acid sequence selected from the group consisting of SEQID NO: 896-909, and 910. In some embodiments, the sequence of theCS1-binding DD variant contains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or10, 1-3, 1-5, or 1-10, non-conservative substitutions in positionscorresponding to amino acid residues: 2-6, 8-10, 12, 13, 15-17, 19, 20,29, 30, 32-34, 36, 37, 39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and68-70, of a reference DD having an amino acid sequence selected from thegroup consisting of SEQ ID NO: 896-909, and 910.

In some embodiments, the disclosure provides CS1-binding DDpp thatcompletely or partially (e.g., overlap with an epitope) block binding ofa reference DD to CS1, wherein the reference DD has an amino acidsequence selected from SEQ ID NO: 896-909, and 910. In otherembodiments, the disclosure provides CS1-binding DDpp that bind to thesame epitope of CS1 as a a reference DD consisting of an amino acidsequence selected from SEQ ID NO: 896-909, and 910.

In some embodiments, the DDpp is a fusion protein comprising a DD thatspecifically binds CS1. In some embodiments, a DD of the DDpp fusionprotein specifically binds CS1 having an amino acid sequence consistingof of SEQ ID NO: 965. In some embodiments, the DDpp comprises an aminoacid sequence selected from the group consisting of SEQ ID NO: 896-909,and 910. In other embodiments, the DDpp comprises a variant of an aminoacid sequence selected from the group consisting of SEQ ID NO: 896-909,and 910. In some embodiments, the DDpp fusion protein comprises afull-length antibody or a portion (fragment) of an antibody. In someembodiments, the DDpp fusion protein comprises a full length IgGantibody (e.g., IgG1, IgG2, IgG2, or IgG4). In further embodiments, theDDpp fusion protein comprises a full length antibody that specificallybinds a cancer antigen. In further embodiments, the DDpp comprises acommercially approved therapeutic antibody (e.g., rituximab, ofatumumab,ocrelizumab, veltuzumab, MEDI-551, epratuzumab, belimumab, tabalumab,AMG-557, MEDI-570, and NN882). In other embodiments, the CS1-bindingDDpp is an Fc fusion protein.

In some embodiments, the DDpp is a fusion protein comprising aCS1-binding DD operably linked to a serum protein. In some embodiments,the CS1-binding DDpp fusion protein comprises an amino acid sequenceselected from the group consisting of SEQ ID NO: 896-909, and 910. Inother embodiments, the CS1-binding DDpp fusion protein comprises avariant of an amino acid sequence selected from the group consisting ofSEQ ID NO: 896-909, and 910. In some embodiments, the CS1-binding DDppfusion protein comprises all or a portion of human serum albumin. Insome embodiments, the DDpp fusion protein comprises AFP (SEQ ID NO: 9),or a fragment thereof. In some embodiments, the CS1-binding DDpp fusionprotein comprises AFP p26 (SEQ ID NO: 10), or a fragment thereof. Insome embodiments, the CS1-binding DDpp fusion protein comprises apolypeptide having the sequence of SEQ ID NO: 10, 968, 969, 970, 971,972, 973, or 974. In some embodiments, the DDpp fusion protein containsa fragment of a serum protein or an antigenic fragment of a serumprotein (e.g., AFP, and AFP p26). In some embodiments, the DDpp fusionprotein comprises a fragment consisting of 5-500, 5-400, 5-300, 5-200,5-100, 5-50, 10-500, 10-400, 10-300, 10-200, 10-100, or 10-50 aminoacids of a serum protein.

In some embodiments, the CS1-binding DDpp fusion protein comprises theextracellular domain of a receptor or a fragment thereof. In someembodiments, the DDpp fusion protein comprises a DD that comprises anamino acid sequence selected from the group consisting of SEQ ID NO:896-909, and 910. In other embodiments, the CS1-binding DDpp fusionprotein comprises a variant of an amino acid sequence selected from thegroup consisting of SEQ ID NO: 896-909, and 910. In further embodiments,the CS1-binding DDpp fusion protein comprises the extracellular domainof CS1 (SEQ ID NO: 965), or a fragment thereof. In some embodiments, theCS1-binding DDpp fusion protein comprises the extracellular domain of areceptor selected from the group consisting of: CD19, CD20, CD22, HVEM,BTLA, DR3, CD37; TSLPR, IL7R, and gp96, or a fragment thereof.

In some embodiments, the CS1-binding DDpp fusion protein contains afragment consisting of 5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500,10-400, 10-300, 10-200, 10-100, or 10-50 amino acids of an extracellulardomain, of a cell surface receptor. In some embodiments, the DDpp fusionprotein contains a fragment of an extracellular domain of BCMA (SEQ IDNO: 7). In some embodiments, the DDpp fusion protein contains a fragmentof an extracellular domain of CD123 (SEQ ID NO: 8). In some embodiments,the DDpp fusion protein contains a fragment of an extracellular domainof CS1 (SEQ ID NO: 965). In some embodiments, the DDpp contains afragment of an extracellular domain, of a receptor selected from thegroup consisting of: CD19, CD20, CD22, HVEM, BTLA, DR3, CD37; TSLPR,IL7R, and gp96.

In additional embodiments, the CS1-binding DDpp fusion protein comprisesan intracellular protein (e.g., a nuclear protein) or a fragmentthereof. In some embodiments, the DDpp fusion protein comprises a DDthat comprises an amino acid sequence selected from the group consistingof SEQ ID NO: 896-909, and 910. In other embodiments, the CS1-bindingDDpp fusion protein comprises a variant of an amino acid sequenceselected from the group consisting of SEQ ID NO: 896-909, and 910. Insome embodiments, the CS1-binding DDpp fusion protein comprises afragment consisting of 5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500,10-400, 10-300, 10-200, 10-100, or 10-50 amino acid residues of anintracellular protein (e.g., a nuclear protein).

HER2-Binding DDpp

In some embodiments, a DD of the DDpp specifically binds HER2. Infurther embodiments, the DD specifically binds HER2 having an amino acidsequence consisting of SEQ ID NO: 967. In some embodiments, the DDppcomprises an amino acid sequence selected from the group consisting ofSEQ ID NO: 911-949, and 950. In other embodiments, the DDpp comprises avariant of an amino acid sequence selected from the group consisting ofSEQ ID NO: 911-949, and 950.

In some embodiments, the HER2-binding DDpp comprises multipletarget-binding domains that bind a single target (e.g., dimers, trimers,etc.). In some embodiments, the DDpp comprises 2, 3, 4, 5, or more than5, DD that specifically bind HER2 and that have an amino acid sequenceselected from the group consisting of SEQ ID NO: 911-949, and 950. Insome embodiments, the DDpp comprises 2, 3, 4, 5, or more than 5, DD thathave the same sequence. In some embodiments, the DDpp comprises 2, 3, 4,5 or more than 5, DD that specifically bind to different epitopes ofHER2 and that have an amino acid sequence selected from the groupconsisting of SEQ ID NO: 911-949, and 950. In some embodiments, the DDppcomprises a DD that specifically binds HER2 and further comprises 2, 3,4, 5 or more than 5, additional different DDs or target-binding bindingdomains (e.g., scFvs) that specifically bind to HER2 or a differenttarget antigen. In some embodiments, the DDpp comprises a DD thatspecifically binds HER2 (e.g., a DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 911-949, and 950) andfurther comprises one or more additional DDs or other target-bindingbinding domains that bind one or more antigens expressed on the surfaceof a cancer cell. In some embodiments, the DDpp comprises a DD thatspecifically binds HER2 e.g., a DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 911-949, and 950) andfurther comprises one or more additional DDs or other target-bindingbinding domains that bind one or more cancer antigens. In someembodiments, the DDpp comprises a DD that specifically binds HER2 (e.g.,a DD having an amino acid sequence selected from the group consisting ofSEQ ID NO: 911-949, and 950) and specifically binds 2, 3, 4, 5, or morethan 5, different targets. In further embodiments, the DDpp comprises aDD that specifically binds HER2 (e.g., a DD having an amino acidsequence selected from the group consisting of SEQ ID NO: 911-949, and950) and specifically binds 2, 3, 4, 5, or more than 5, different cancerantigens. In some embodiments, the DDpp comprises a DD that specificallybinds HER2 (e.g., a DD having an amino acid sequence selected from thegroup consisting of SEQ ID NO: 911-949, and 950) and specifically binds2, 3, 4, 5, or more than 5, different cancer antigens expressed on thesurface of a cancer cell. In some embodiments, the DDpp comprises a DDthat specifically binds HER2 (e.g., a DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 911-949, and 950) andspecifically binds 2, 3, 4, 5, or more than 5, cancer antigens expressedon the surface of different cancer cells.

In some embodiments, the DDpp comprises a variant of a HER2-binding DDdisclosed herein (reference DD) that retains the ability to specificallybind HER2. In some embodiments, the sequence of the HER2-binding DDvariant contains 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions compared to a referenceHER2-binding DD having an amino acid sequence selected from the groupconsisting of SEQ ID NO: 911-949, and 950. In some embodiments, thesequence of the HER2-binding DD variant contains 1, 2, 3, 4, 5, 6, 7, 8,9, or 10, 1-3, 1-5, or 1-10, conservative substitutions compared to areference HER2-binding DD having an amino acid sequence selected fromthe group consisting of SEQ ID NO: 911-949, and 950. In someembodiments, the sequence of the HER2-binding DD variant contains 1, 2,3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10, non-conservativesubstitutions compared to a reference HER2-binding DD having an aminoacid sequence selected from the group consisting of SEQ ID NO: 911-949,and 950.

In some embodiments, the sequence of the HER2-binding DD variantcontains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions in positionscorresponding to amino acid residues 1-22, 29-46, and 52-72, of areference HER2-binding DD having an amino acid sequence selected fromthe group consisting of SEQ ID NO: 911-949, and 950. In someembodiments, the sequence of the HER2-binding DD variant contains atotal of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative substitutions in positions corresponding to amino acidresidues 1-22, 29-46, and 52-72, of a reference HER2-DD having an aminoacid sequence selected from the group consisting of SEQ ID NO: 911-949,and 950. In some embodiments, the sequence of the HER2-binding DDvariant contains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5,or 1-10, non-conservative substitutions in positions corresponding toamino acid residues 1-22, 29-46, and 52-72, of a reference HER2-bindingDD having an amino acid sequence selected from the group consisting ofSEQ ID NO: 911-949, and 950.

In some embodiments, the sequence of the HER2-binding DD variantcontains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions in positionscorresponding to amino acid residues: 2-6, 8-10, 12, 13, 15-17, 19, 20,29, 30, 32-34, 36, 37, 39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and68-70, of a reference HER2-binding DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 911-949, and 950. Insome embodiments, the sequence of the HER2-binding DD variant contains atotal of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative substitutions in positions corresponding to amino acidresidues: 2-6, 8-10, 12, 13, 15-17, 19, 20, 29, 30, 32-34, 36, 37,39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and 68-70, of a reference DDhaving an amino acid sequence selected from the group consisting of SEQID NO: 911-949, and 950. In some embodiments, the sequence of theHER2-binding DD variant contains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9,or 10, 1-3, 1-5, or 1-10, non-conservative substitutions in positionscorresponding to amino acid residues: 2-6, 8-10, 12, 13, 15-17, 19, 20,29, 30, 32-34, 36, 37, 39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and68-70, of a reference DD having an amino acid sequence selected from thegroup consisting of SEQ ID NO: 911-949, and 950.

In some embodiments, the disclosure provides HER2-binding DDpp thatcompletely or partially (e.g., overlap with an epitope) block binding ofa reference DD to HER2, wherein the reference DD has an amino acidsequence selected from SEQ ID NO: 911-949, and 950. In otherembodiments, the disclosure provides HER2-binding DDpp that bind to thesame epitope of HER2 as a reference DD consisting of an amino acidsequence selected from SEQ ID NO: 911-949, and 950.

In some embodiments, the DDpp is a fusion protein comprising a DD thatspecifically binds HER2. In some embodiments, a DD of the DDpp fusionprotein specifically binds HER2 having an amino acid sequence consistingof SEQ ID NO: 967. In some embodiments, the DDpp comprises an amino acidsequence selected from the group consisting of SEQ ID NO: 911-949, and950. In other embodiments, the DDpp comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 911-949, and950. In some embodiments, the DDpp fusion protein comprises afull-length antibody or a portion (fragment) of an antibody. In someembodiments, the DDpp fusion protein comprises a full length IgGantibody (e.g., IgGI, IgG2, IgG2, or IgG4). In further embodiments, theDDpp fusion protein comprises a full length antibody that specificallybinds a cancer antigen. In further embodiments, the DDpp comprises acommercially approved therapeutic antibody (e.g., rituximab, ofatumumab,ocrelizumab, veltuzumab, MEDI-551, epratuzumab, belimumab, tabalumab,AMG-557, MEDI-570, and NN882). In other embodiments, the HER2-bindingDDpp is an Fc fusion protein.

In some embodiments, the DDpp is a fusion protein comprising aHER2-binding DD operably linked to a serum protein. In some embodiments,the HER2-binding DDpp fusion protein comprises an amino acid sequenceselected from the group consisting of SEQ ID NO: 911-949, and 950. Inother embodiments, the HER2-binding DDpp fusion protein comprises avariant of an amino acid sequence selected from the group consisting ofSEQ ID NO: 911-949, and 950. In some embodiments, the HER2-binding DDppfusion protein comprises all or a portion of human serum albumin. Insome embodiments, the DDpp fusion protein comprises AFP (SEQ ID NO: 9),or a fragment thereof. In some embodiments, the HER2-binding DDpp fusionprotein comprises AFP p26 (SEQ ID NO: 10), or a fragment thereof. Insome embodiments, the HER2-bindng DDpp fusion protein comprises apolypeptide having the sequence of SEQ ID NO: 10, 968, 969, 970, 971,972, 973, or 974. In some embodiments, the DDpp fusion protein containsa fragment of a serum protein or an antigenic fragment of a serumprotein (e.g., AFP, and AFP p26). In some embodiments, the DDpp fusionprotein comprises a fragment consisting of 5-500, 5-400, 5-300, 5-200,5-100, 5-50, 10-500, 10-400, 10-300, 10-200, 10-100, or 10-50 aminoacids of a serum protein.

In some embodiments, the HER2-binding DDpp fusion protein comprises theextracellular domain of a receptor or a fragment thereof. In someembodiments, the DDpp fusion protein comprises a DD that comprises anamino acid sequence selected from the group consisting of SEQ ID NO:911-949, and 950. In other embodiments, the HER2-binding DDpp fusionprotein comprises a variant of an amino acid sequence selected from thegroup consisting of SEQ ID NO: 911-949, and 950. In further embodiments,the HER2-binding DDpp fusion protein comprises the extracellular domainof HER2 (SEQ ID NO: 967), or a fragment thereof. In some embodiments,the HER2-binding DDpp fusion protein comprises the extracellular domainof a receptor selected from the group consisting of: CD19, CD20, CD22,HVEM, BTLA, DR3, CD37; TSLPR, IL7R, and gp96, or a fragment thereof.

In some embodiments, the HER2-binding DDpp fusion protein contains afragment consisting of 5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500,10-400, 10-300, 10-200, 10-100, or 10-50 amino acids of an extracellulardomain, of a cell surface receptor. In some embodiments, the DDpp fusionprotein contains a fragment of an extracellular domain of BCMA (SEQ IDNO: 7). In some embodiments, the DDpp fusion protein contains a fragmentof an extracellular domain of CD123 (SEQ ID NO: 8). In some embodiments,the DDpp fusion protein contains a fragment of an extracellular domainof CS1 (SEQ ID NO: 965). In some embodiments, the DDpp contains afragment of an extracellular domain, of a receptor selected from thegroup consisting of: CD19, CD20, CD22, HVEM, BTLA, DR3, CD37; TSLPR,IL7R, and gp96.

In additional embodiments, the HER2-binding DDpp fusion proteincomprises an intracellular protein (e.g., a nuclear protein) or afragment thereof. In some embodiments, the DDpp fusion protein comprisesa DD that comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 911-949, and 950. In other embodiments, theHER2-binding DDpp fusion protein comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 911-949, and950. In some embodiments, the HER2-binding DDpp fusion protein comprisesa fragment consisting of 5-500, 5-400, 5-300, 5-200, 5-100, 5-50,10-500, 10-400, 10-300, 10-200, 10-100, or 10-50 amino acid residues ofan intracellular protein (e.g., a nuclear protein).

AFP-Binding DDpp

In some embodiments, a DD of the DDpp specifically binds AFP or afragment thereof. In further embodiments, a DD of the DDpp specificallybinds AFP having an amino acid sequence consisting of SEQ ID NO: 9 or afragement thereof. In some embodiments, the DDpp comprises an amino acidsequence selected from the group consisting of SEQ ID NO: 741-874, and886-895. In additional embodiments, the AFP-binding DDpp comprises avariant of an amino acid sequence selected from the group consisting ofSEQ ID NO: 741-874, and 886-895.

In some embodiments, the AFP-binding DDpp comprises multipletarget-binding domains that bind a single target (e.g., dimers, trimers,etc.). In some embodiments, the DDpp comprises 2, 3, 4, 5, or more than5, DD that specifically bind AFP and that have an amino acid sequenceselected from the group consisting of SEQ ID NO: 741-874, and 886-895.In some embodiments, the DDpp comprises 2, 3, 4, 5, or more than 5, DDthat have the same sequence. In some embodiments, the DDpp comprises 2,3, 4, 5 or more than 5, DD that specifically bind to different epitopesof AFP and that have an amino acid sequence selected from the groupconsisting of SEQ ID NO: 741-874, and 886-895. In some embodiments, theDDpp comprises a DD that specifically binds AFP and further comprises 2,3, 4, 5 or more than 5, additional different DDs or target-bindingbinding domains (e.g., scFvs) that specifically bind to AFP or adifferent target antigen. In some embodiments, the DDpp comprises a DDthat specifically binds AFP (e.g., a DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 741-874, and 886-895)and further comprises one or more additional DDs or other target-bindingbinding domains that bind one or more antigens expressed on the surfaceof a B cell. In some embodiments, the DDpp comprises a DD thatspecifically binds AFP e.g., a DD having an amino acid sequence selectedfrom the group consisting of SEQ ID NO: 741-874, and 886-895) andfurther comprises one or more additional DDs or other target-bindingbinding domains that bind one or more cancer antigens. In someembodiments, the DDpp comprises a DD that specifically binds AFP (e.g.,a DD having an amino acid sequence selected from the group consisting ofSEQ ID NO: 741-874, and 886-895) and specifically binds 2, 3, 4, 5, ormore than 5, different targets. In further embodiments, the DDppcomprises a DD that specifically binds AFP (e.g., a DD having an aminoacid sequence selected from the group consisting of SEQ ID NO: 741-874,and 886-895) and specifically binds 2, 3, 4, 5, or more than 5,different cancer antigens. In some embodiments, the DDpp comprises a DDthat specifically binds AFP (e.g., a DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 741-874, and 886-895)and specifically binds 2, 3, 4, 5, or more than 5, different cancerantigens expressed on the surface of a cancer cell. In some embodiments,the DDpp comprises a DD that specifically binds AFP (e.g., a DD havingan amino acid sequence selected from the group consisting of SEQ ID NO:741-874, and 886-895) and specifically binds 2, 3, 4, 5, or more than 5,cancer antigens expressed on the surface of different cancer cells.

In some embodiments, the DDpp comprises a variant of a AFP-binding DDdisclosed herein (reference DD) that retains the ability to specificallybind AFP. In some embodiments, the sequence of the AFP-binding DDvariant contains 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions compared to a referenceAFP-binding DD having an amino acid sequence selected from the groupconsisting of SEQ ID NO: 741-874, and 886-895. In some embodiments, thesequence of the AFP-binding DD variant contains 1, 2, 3, 4, 5, 6, 7, 8,9, or 10, 1-3, 1-5, or 1-10, conservative substitutions compared to areference AFP-binding DD having an amino acid sequence selected from thegroup consisting of SEQ ID NO: 741-874, and 886-895. In someembodiments, the sequence of the AFP-binding DD variant contains 1, 2,3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10, non-conservativesubstitutions compared to a reference AFP-binding DD having an aminoacid sequence selected from the group consisting of SEQ ID NO: 741-874,and 886-895.

In some embodiments, the sequence of the AFP-binding DD variant containsa total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions in positionscorresponding to amino acid residues 1-22, 29-46, and 52-72, of areference AFP-binding DD having an amino acid sequence selected from thegroup consisting of SEQ ID NO: 4741-874, and 886-895. In someembodiments, the sequence of the AFP-binding DD variant contains a totalof 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10, conservativesubstitutions in positions corresponding to amino acid residues 1-22,29-46, and 52-72, of a reference AFP-DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 741-874, and 886-895.In some embodiments, the sequence of the AFP-binding DD variant containsa total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,non-conservative substitutions in positions corresponding to amino acidresidues 1-22, 29-46, and 52-72, of a reference AFP-binding DD having anamino acid sequence selected from the group consisting of SEQ ID NO:741-874, and 886-895.

In some embodiments, the sequence of the AFP-binding DD variant containsa total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions in positionscorresponding to amino acid residues: 2-6, 8-10, 12, 13, 15-17, 19, 20,29, 30, 32-34, 36, 37, 39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and68-70, of a reference AFP-binding DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 741-874, and 886-895.In some embodiments, the sequence of the AFP-binding DD variant containsa total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative substitutions in positions corresponding to amino acidresidues: 2-6, 8-10, 12, 13, 15-17, 19, 20, 29, 30, 32-34, 36, 37,39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and 68-70, of a reference DDhaving an amino acid sequence selected from the group consisting of SEQID NO: 741-874, and 886-895. In some embodiments, the sequence of theAFP-binding DD variant contains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or10, 1-3, 1-5, or 1-10, non-conservative substitutions in positionscorresponding to amino acid residues: 2-6, 8-10, 12, 13, 15-17, 19, 20,29, 30, 32-34, 36, 37, 39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and68-70, of a reference DD having an amino acid sequence selected from thegroup consisting of SEQ ID NO: 741-874, and 886-895.

In some embodiments, the disclosure provides an AFP-binding DDpp thatcompletely or partially (e.g., overlap with an epitope) block binding ofa reference DD to AFP, wherein the reference DD has an amino acidsequence selected from SEQ ID NO: 741 873, and 874. In otherembodiments, the disclosure provides AFP-binding DDpp that bind to thesame epitope of AFP as a a reference DD consisting of an amino acidsequence selected from SEQ ID NO: 741 873, and 874.

In some embodiments, the DDpp is a fusion protein comprising a DD thatspecifically binds AFP. In some embodiments, the DDpp is a fusionprotein comprising a DD that specifically binds AFP having an amino acidsequence consisting of SEQ ID NO: 9. In further embodiments, the DDppcomprises an amino acid sequence selected from the group consisting ofSEQ ID NO: 741-874, and 886-895. In other embodiments, the DDpp is afusion protein comprising a AFP-binding DD that is a variant of a DDcomprising an amino acid sequence selected from the group consisting ofSEQ ID NO: 741-874, and 886-895.

In some embodiments, the DDpp is a fusion protein comprising a DD thatspecifically binds AFP operably linked to a full-length antibody or aportion (fragment) of an antibody. In some embodiments, the DDpp is anFc fusion protein. In some embodiment, the DDpp fusion protein comprisesa full length IgG antibody (e.g., IgGI, IgG2, IgG2, or IgG4). In furtherembodiments, the DDpp fusion protein comprises a full length antibodythat specifically binds a cancer antigen. In further embodiments, theDDpp comprises a commercially approved therapeutic antibody (e.g.,rituximab, ofatumumab, ocrelizumab, veltuzumab, MEDI-551, epratuzumab,belimumab, tabalumab, AMG-557, MEDI-570, and NN882). In otherembodiments, the AFP-binding DDpp is an Fc fusion protein.

In some embodiments, the DDpp is a fusion protein comprising anAFP-binding DD operably linked to a serum protein. In some embodiments,the DDpp fusion protein comprises an amino acid sequence selected fromthe group consisting of SEQ ID NO: 741-874, and 886-895. In otherembodiments, the AFP-binding DDpp fusion protein comprises a variant ofan amino acid sequence selected from the group consisting of SEQ ID NO:741-874, and 886-895. In further embodiments, the DDpp fusion proteincomprises human serum albumin or a fragment thereof. In someembodiments, the DDpp fusion protein contains a fragment of a serumprotein or an antigenic fragment of a serum protein. In someembodiments, the DDpp fusion protein comprises a fragment consisting of5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500, 10-400, 10-300, 10-200,10-100, or 10-50 amino acids of a serum protein.

In some embodiments, the AFP-binding DDpp fusion protein comprises theextracellular domain of a receptor or a fragment thereof. In someembodiments, the DDpp fusion protein comprises a DD that comprises anamino acid sequence selected from the group consisting of SEQ ID NO:741-874, and 886-895. In other embodiments, the AFP-binding DDpp fusionprotein comprises a variant of an amino acid sequence selected from thegroup consisting of SEQ ID NO: 741-874, and 886-895. In furtherembodiments, the AFP-binding DDpp fusion protein comprises theextracellular domain of BCMA (SEQ ID NO: 7) or CD123 (SEQ ID NO: 8), ora fragment thereof. In further embodiments, the AFP-binding DDpp fusionprotein comprises the extracellular domain of BCMA (SEQ ID NO: 7), CD123(SEQ ID NO: 8), or CS1 (SEQ ID NO: 965), or a fragment thereof. In someembodiments, the AFP-binding DDpp fusion protein comprises theextracellular domain of of a receptor selected from the group consistingof: CD19, CD20, CD22, HVEM, BTLA, DR3, CD37; TSLPR, IL7R, and gp96, or afragment thereof.

In some embodiments, the AFP-binding DDpp fusion protein contains afragment consisting of 5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500,10-400, 10-300, 10-200, 10-100, or 10-50 amino acids of an extracellulardomain, of a cell surface receptor. In some embodiments, the DDpp fusionprotein contains a fragment of an extracellular domain of BCMA (SEQ IDNO: 7) or CD123 (SEQ ID NO: 8). In some embodiments, the DDpp fusionprotein contains a fragment of an extracellular domain of BCMA (SEQ IDNO: 7), or CD123 (SEQ ID NO: 8), or CS1 (SEQ ID NO: 965). In someembodiments, the DDpp contains a fragment of an extracellular domain, ofa receptor selected from the group consisting of: CD19, CD20, CD22,HVEM, BTLA, DR3, CD37; TSLPR, IL7R, and gp96.

In additional embodiments, the AFP-binding DDpp fusion protein comprisesan intracellular protein (e.g., a nuclear protein) or a fragmentthereof. In some embodiments, the DDpp fusion protein comprises a DDthat comprises an amino acid sequence selected from the group consistingof SEQ ID NO: 741-874, and 886-895. In other embodiments, theAFP-binding DDpp fusion protein comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 741-874, and886-895. In some embodiments, the AFP-binding DDpp fusion proteincomprises a fragment consisting of 5-500, 5-400, 5-300, 5-200, 5-100,5-50, 10-500, 10-400, 10-300, 10-200, 10-100, or 10-50 amino acidresidues of an intracellular protein (e.g., a nuclear protein).

AFP p26-Binding DDpp

In some embodiments, a DD of the DDpp specifically binds AFP p26. Infurther embodiments, a DD of the DDpp specifically binds AFP p26 havingan amino acid sequence consisting of SEQ ID NO: 10. In some embodiments,the DDpp comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 741-874, and 886-895. In additionalembodiments, the AFP p26-binding DDpp comprises a variant of an aminoacid sequence selected from the group consisting of SEQ ID NO: 741-874,and 886-895.

In some embodiments, the AFP p26-binding DDpp comprises multipletarget-binding domains that bind a single target (e.g., dimers, trimers,etc.). In some embodiments, the DDpp comprises 2, 3, 4, 5, or more than5, DD that specifically bind AFP p26 and that have an amino acidsequence selected from the group consisting of SEQ ID NO: 741-874, and886-895. In some embodiments, the DDpp comprises 2, 3, 4, 5, or morethan 5, DD that have the same sequence. In some embodiments, the DDppcomprises 2, 3, 4, 5 or more than 5, DD that specifically bind todifferent epitopes of AFP p26 and that have an amino acid sequenceselected from the group consisting of SEQ ID NO: 741-874, and 886-895.In some embodiments, the DDpp comprises a DD that specifically binds AFPp26 and further comprises 2, 3, 4, 5 or more than 5, additionaldifferent DDs or target-binding binding domains (e.g., scFvs) thatspecifically bind to AFP p26 or a different target antigen. In someembodiments, the DDpp comprises a DD that specifically binds AFP p26(e.g., a DD having an amino acid sequence selected from the groupconsisting of SEQ ID NO: 741-874, and 886-895) and further comprises oneor more additional DDs or other target-binding binding domains that bindone or more antigens expressed on the surface of a B cell. In someembodiments, the DDpp comprises a DD that specifically binds AFP p26e.g., a DD having an amino acid sequence selected from the groupconsisting of SEQ ID NO: 741-874, and 886-895) and further comprises oneor more additional DDs or other target-binding binding domains that bindone or more cancer antigens. In some embodiments, the DDpp comprises aDD that specifically binds AFP p26 (e.g., a DD having an amino acidsequence selected from the group consisting of SEQ ID NO: 741-874, and886-895) and specifically binds 2, 3, 4, 5, or more than 5, differenttargets. In further embodiments, the DDpp comprises a DD thatspecifically binds AFP p26 (e.g., a DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 741-874, and 886-895)and specifically binds 2, 3, 4, 5, or more than 5, different cancerantigens. In some embodiments, the DDpp comprises a DD that specificallybinds AFP p26 (e.g., a DD having an amino acid sequence selected fromthe group consisting of SEQ ID NO: 741-874, and 886-895) andspecifically binds 2, 3, 4, 5, or more than 5, different cancer antigensexpressed on the surface of a cancer cell. In some embodiments, the DDppcomprises a DD that specifically binds AFP p26 (e.g., a DD having anamino acid sequence selected from the group consisting of SEQ ID NO:741-874, and 886-895) and specifically binds 2, 3, 4, 5, or more than 5,cancer antigens expressed on the surface of different cancer cells.

In some embodiments, the DDpp comprises a variant of a AFP p26-bindingDD disclosed herein (reference DD) that retains the ability tospecifically bind AFP p26. In some embodiments, the sequence of the AFPp26-binding DD variant contains 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3,1-5, or 1-10, conservative or non-conservative substitutions compared toa reference AFP p26-binding DD having an amino acid sequence selectedfrom the group consisting of SEQ ID NO: 741-874, and 886-895. In someembodiments, the sequence of the AFP p26-binding DD variant contains 1,2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10, conservativesubstitutions compared to a reference AFP p26-binding DD having an aminoacid sequence selected from the group consisting of SEQ ID NO: 741-874,and 886-895. In some embodiments, the sequence of the AFP p26-binding DDvariant contains 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,non-conservative substitutions compared to a reference AFP p26-bindingDD having an amino acid sequence selected from the group consisting ofSEQ ID NO: 741-874, and 886-895.

In some embodiments, the sequence of the AFP p26-binding DD variantcontains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions in positionscorresponding to amino acid residues 1-22, 29-46, and 52-72, of areference AFP p26-binding DD having an amino acid sequence selected fromthe group consisting of SEQ ID NO: 4741-874, and 886-895. In someembodiments, the sequence of the AFP p26-binding DD variant contains atotal of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative substitutions in positions corresponding to amino acidresidues 1-22, 29-46, and 52-72, of a reference AFP p26-DD having anamino acid sequence selected from the group consisting of SEQ ID NO:741-874, and 886-895. In some embodiments, the sequence of the AFPp26-binding DD variant contains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or10, 1-3, 1-5, or 1-10, non-conservative substitutions in positionscorresponding to amino acid residues 1-22, 29-46, and 52-72, of areference AFP p26-binding DD having an amino acid sequence selected fromthe group consisting of SEQ ID NO: 741-874, and 886-895.

In some embodiments, the sequence of the AFP p26-binding DD variantcontains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative or non-conservative substitutions in positionscorresponding to amino acid residues: 2-6, 8-10, 12, 13, 15-17, 19, 20,29, 30, 32-34, 36, 37, 39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and68-70, of a reference AFP p26-binding DD having an amino acid sequenceselected from the group consisting of SEQ ID NO: 741-874, and 886-895.In some embodiments, the sequence of the AFP p26-binding DD variantcontains a total of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, 1-3, 1-5, or 1-10,conservative substitutions in positions corresponding to amino acidresidues: 2-6, 8-10, 12, 13, 15-17, 19, 20, 29, 30, 32-34, 36, 37,39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and 68-70, of a reference DDhaving an amino acid sequence selected from the group consisting of SEQID NO: 741-874, and 886-895. In some embodiments, the sequence of theAFP p26-binding DD variant contains a total of 1, 2, 3, 4, 5, 6, 7, 8,9, or 10, 1-3, 1-5, or 1-10, non-conservative substitutions in positionscorresponding to amino acid residues: 2-6, 8-10, 12, 13, 15-17, 19, 20,29, 30, 32-34, 36, 37, 39-41, 43, 44, 52-55, 57-59, 61, 62, 64-66, and68-70, of a reference DD having an amino acid sequence selected from thegroup consisting of SEQ ID NO: 741-874, and 886-895.

In some embodiments, the disclosure provides an AFP p26-binding DDppthat completely or partially (e.g., overlap with an epitope) blockbinding of a reference DD to AFP p26, wherein the reference DD has anamino acid sequence selected from SEQ ID NO: 741 873, and 874. In otherembodiments, the disclosure provides AFP p26-binding DDpp that bind tothe same epitope of AFP p26 as a a reference DD consisting of an aminoacid sequence selected from SEQ ID NO: 741 873, and 874.

In some embodiments, the DDpp is a fusion protein comprising a DD thatspecifically binds AFP p26. In some embodiments, the DDpp is a fusionprotein comprising a DD that specifically binds AFP p26 having an aminoacid sequence consisting of SEQ ID NO: 9. In further embodiments, theDDpp comprises an amino acid sequence selected from the group consistingof SEQ ID NO: 741-874, and 886-895. In other embodiments, the DDpp is afusion protein comprising a AFP p26-binding DD that is a variant of a DDcomprising an amino acid sequence selected from the group consisting ofSEQ ID NO: 741-874, and 886-895. In some embodiments, the DDpp is afusion protein comprising a DD that specifically binds AFP p26 operablylinked to a full-length antibody or a portion (fragment) of an antibody.In some embodiments, the DDpp is an Fc fusion protein. In someembodiment, the DDpp fusion protein comprises a full length IgG antibody(e.g., IgG1, IgG2, IgG2, or IgG4). In further embodiments, the DDppfusion protein comprises a full length antibody that specifically bindsa cancer antigen. In further embodiments, the DDpp comprises acommercially approved therapeutic antibody (e.g., rituximab, ofatumumab,ocrelizumab, veltuzumab, MEDI-551, epratuzumab, belimumab, tabalumab,AMG-557, MEDI-570, and NN882). In other embodiments, the AFP p26-bindingDDpp is an Fc fusion protein. In further embodiments, the Fc fusionprotein comprises a variant human Fc domain.

In some embodiments, the DDpp is a fusion protein comprising an AFPp26-binding DD operably linked to a serum protein. In some embodiments,the DDpp fusion protein comprises an amino acid sequence selected fromthe group consisting of SEQ ID NO: 741-874, and 886-895. In otherembodiments, the AFP p26-binding DDpp fusion protein comprises a variantof an amino acid sequence selected from the group consisting of SEQ IDNO: 741-874, and 886-895. In further embodiments, the DDpp fusionprotein comprises human serum albumin or a fragment thereof. In someembodiments, the DDpp fusion protein contains a fragment of a serumprotein or an antigenic fragment of a serum protein. In someembodiments, the DDpp fusion protein comprises a fragment consisting of5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500, 10-400, 10-300, 10-200,10-100, or 10-50 amino acids of a serum protein.

In some embodiments, the AFP p26-binding DDpp fusion protein comprisesthe extracellular domain of a receptor or a fragment thereof. In someembodiments, the DDpp fusion protein comprises a DD that comprises anamino acid sequence selected from the group consisting of SEQ ID NO:741-874, and 886-895. In other embodiments, the AFP p26-binding DDppfusion protein comprises a variant of an amino acid sequence selectedfrom the group consisting of SEQ ID NO: 741-874, and 886-895. In furtherembodiments, the AFP p26-binding DDpp fusion protein comprises theextracellular domain of BCMA (SEQ ID NO: 7) or CD123 (SEQ ID NO: 8), ora fragment thereof. In further embodiments, the AFP p26-binding DDppfusion protein comprises the extracellular domain of BCMA (SEQ ID NO:7), or CD123 (SEQ ID NO: 8), or CS1 (SEQ ID NO: 965), or a fragmentthereof. In some embodiments, the AFP p26-binding DDpp fusion proteincomprises the extracellular domain of of a receptor selected from thegroup consisting of: CD19, CD20, CD22, HVEM, BTLA, DR3, CD37; TSLPR,IL7R, and gp96, or a fragment thereof.

In some embodiments, the AFP p26-binding DDpp fusion protein contains afragment consisting of 5-500, 5-400, 5-300, 5-200, 5-100, 5-50, 10-500,10-400, 10-300, 10-200, 10-100, or 10-50 amino acids of an extracellulardomain, of a cell surface receptor. In some embodiments, the DDpp fusionprotein contains a fragment of an extracellular domain of BCMA (SEQ IDNO: 7) or CD123 (SEQ ID NO: 8). In some embodiments, the DDpp fusionprotein contains a fragment of an extracellular domain of BCMA (SEQ IDNO: 7), or CD123 (SEQ ID NO: 8), or CS1 (SEQ ID NO: 965). In someembodiments, the DDpp contains a fragment of an extracellular domain, ofa receptor selected from the group consisting of: CD19, CD20, CD22,HVEM, BTLA, DR3, CD37; TSLPR, IL7R, and gp96.

In additional embodiments, the AFP p26-binding DDpp fusion proteincomprises an intracellular protein (e.g., a nuclear protein) or afragment thereof. In some embodiments, the DDpp fusion protein comprisesa DD that comprises an amino acid sequence selected from the groupconsisting of SEQ ID NO: 741-874, and 886-895. In other embodiments, theAFP p26-binding DDpp fusion protein comprises a variant of an amino acidsequence selected from the group consisting of SEQ ID NO: 741-874, and886-895. In some embodiments, the AFP p26-binding DDpp fusion proteincomprises a fragment consisting of 5-500, 5-400, 5-300, 5-200, 5-100,5-50, 10-500, 10-400, 10-300, 10-200, 10-100, or 10-50 amino acidresidues of an intracellular protein (e.g., a nuclear protein).

Nucleic acids encoding the DDpp and vectors containing the nucleic acidsare also provided. Host cells (including viral particles) containing thenucleic acids and vectors are also provided. In some embodiments, thehost cell is a prokaryote or a eukaryote that display the variant DD onits surface. In some embodiments, the host cell displays the variant DDon its surface. In a further embodiment, the host cell is a phage thatdisplays the variant DD on its surface. In a further embodiment, thehost cell is a human immune cell that expresses a variant DD fusionprotein on its surface.

A DDpp agonist refers to a DDpp that in some way increases or enhancesthe biological activity of the DDpp target or has biological activitycomparable to a known agonist of the DDpp target. In another embodiment,the DDpp is an antagonist of the target it binds. A DDpp antagonistrefers to a DDpp that completely or partially blocks or in some wayinterferes with the biological activity of the DDpp target protein orhas biological activity comparable to a known antagonist or inhibitor ofthe DDpp target protein.

Expressions like “binding affinity for a target”, “binding to a target”and the like refer to a property of a polypeptide which may be directlymeasured through the determination of the affinity constants, e.g., theamount of DDpp that associates and dissociates at a given antigenconcentration. Different methods can be used to characterize themolecular interaction, including but not limited to, competitionanalysis, equilibrium analysis and microcalorimetric analysis, andreal-time interaction analysis based on surface plasmon resonanceinteraction (for example using a Biacore® instrument). These methods areknown to the skilled person and are described, for example, in Neri etal., Tibtech 14: 465-470 (1996) and Jansson et al., J Biol Chem 272:8189-8197 (1997).

Affinity requirements for a given DDpp binding event are contingent on avariety of factors including, but not limited to: the composition andcomplexity of the binding matrix, the valency and density of both theDDpp and target molecules, and the functional application of the DDpp.In one embodiment, DDpp bind a target of interest (e.g., BCMA, CD123,AFP, or AFP p26) with a dissociation constant (KD) of less than or equalto 5×10⁻³ M, 10⁻³ M, 5×10⁻⁴ M, 10⁻⁴ M, 5×10⁻⁵ M, or 10⁻⁵ M. In anadditional embodiment, a DDpp binds a target of interest with a KD ofless than or equal to 5×10⁻⁶ M, 10⁻⁶ M, 5×10⁻⁷ M, 10⁻⁷M, 5×10⁻⁸ M, or10⁻⁸ M. In additional embodiments, a DDpp binds a target of interestwith a KD of less than or equal to 5×10⁻⁹ M, 10⁻⁹ M, 5×10⁻¹⁰ M, 10⁻¹⁰ M,5×10⁻¹¹ M, 10⁻¹¹ M, 5×10⁻¹² M, 10⁻¹² M, 5×10⁻¹³ M, 10⁻¹³ M, 5×10⁻¹⁴ M,10⁻¹⁴ M, 5×10−15 M, or 10⁻¹⁵ M. In some embodiments, the provided DDpphas a dissociation constant selected from the group consisting ofbetween 10⁻⁴ M and 10⁻⁵M, between 10⁻⁵ M and 10⁻⁶ M, between 10⁻⁶ M and10−7 M, between 10⁻⁷ M and 10⁻⁸ M, between 10⁻⁸ M and 10⁻⁹ M, between10⁻⁹ M and 10⁻¹⁰ M, between 10⁻¹⁰ M and 10⁻¹¹ M and between 10⁻¹¹ M and10⁻¹² M.

In some embodiments, the DDpp binds a target of interest (e.g., BCMA,CD123, AFP, or AFP p26) in active form. In one embodiment the DDppreversibly binds the target of interest in active form and also releasesthe bound target in active form. In some embodiments, the DDpp binds atarget of interest in the native form. In specific embodiments, DDppbinds a target of interest with an off-rates or K_(a) of greater than orequal to 10⁻¹⁰ sec⁻¹, 5×10⁻⁹ sec⁻¹, 10⁻⁹ sec⁻¹, 5×10⁻⁸ sec⁻¹, 10⁻⁸sec⁻¹, 5×10⁻⁷ sec⁻¹, 10⁻⁷ sec⁻¹, 5×10−6 sec⁻¹, 10⁻⁶ sec⁻¹, 5×10⁻⁵ sec⁻¹,10⁻⁵ sec⁻¹, 5×10⁻⁴ sec⁻¹, 10⁻⁴ sec⁻¹, 5×10⁻³ sec⁻¹, 10⁻³ sec⁻¹, 5×10⁻²sec⁻¹, 10⁻² sec⁻¹, 5×10⁻¹ sec⁻¹, or 10⁻¹ sec⁻¹.

Binding experiments to determine KD and off-rates can routinely beperformed in a number of conditions including, but not limited to, [pH6.0, 0.01% Tween 2, [pH 6.0, 0.1% gelatin], [p H5.0, 0.01% Tween 2, [pH9.0, 0.1% Tween 2, [pH 6.0, 15% ethylene glycol, 0.01% Tween 2, [pH 5.0,15% ethylene glycol, 0.01% Tween 2, and [pH 9.0, 15% ethylene glycol,0.01% Tween 2. The buffers in which to make these solutions canroutinely be determined by one skilled in the art, and depend largely onthe desired pH of the final solution. Low pH solutions (<pH 5.5) can bemade, for example, in citrate buffer, glycine-HCl buffer, or in succinicacid buffer. High pH solutions can be made, for example, in Tris-HCl,phosphate buffers, or sodium bicarbonate buffers. A number of conditionsmay routinely be used by those skilled in the art to determine KD andoff-rates for the purpose of determining, for example, optimal pH and/orsalt concentrations.

In one embodiment, the DDpp specifically binds a target of interest(e.g., BCMA, CD123, AFP, or AFP p26) with a K_(Off) ranging from 0.1 to10⁻⁷ sec⁻¹, 10⁻² to 10⁻⁷ sec⁻¹, or 0.5×10⁻² to 10⁻⁷ sec⁻¹. In a specificembodiment, the DDpp (e.g., a DDpp fusion protein) binds a target ofinterest with an off rate (K_(Off)) of less than 5×10⁻² sec⁻¹, 10⁻²sec⁻, 5×10⁻³ sec⁻¹, or 10⁻³ sec⁻¹. In an additional embodiment, a DDpp,binds a target of interest with an off rate (K_(Off)) of less than5×10⁻⁴ sec⁻¹, 10⁻⁴ sec⁻¹, 5×10⁻⁵ sec⁻¹, or 10⁻⁵ sec⁻¹, 5×10⁻⁶ sec⁻¹,10⁻⁶ sec⁻¹, 5×10⁻⁷ sec⁻¹, or 10⁻⁷ sec⁻¹.

In one embodiment, the DDpp specifically binds a target of interest(e.g., BCMA, CD123, AFP, or AFP p26) with a K_(On) ranging from 10³ to10⁷ M⁻¹ sec⁻¹, 10³ to 10⁶ M⁻¹ sec⁻¹, or 10 to 105 M⁻¹ sec⁻¹. In aspecific embodiment, the DDpp (e.g., a DDpp fusion protein) binds thetarget of interest with an on rate (K_(On)) of greater than 10 M⁻¹sec⁻¹, 5×10³ M⁻¹ sec⁻¹, 10⁴ M⁻¹ sec⁻¹, or 5×10⁴ M⁻¹ sec⁻¹. In anadditional embodiment, the DDpp, binds the target of interest with aK_(On) of greater than 10⁵ M⁻¹ sec⁻¹, 5×10⁵ M⁻¹ sec⁻¹, 10⁶M⁻¹ sec⁻¹, or5×10⁶ M⁻¹ sec⁻¹, or 10⁷ M⁻¹ sec⁻¹.

Nucleic acid molecules encoding the disclosed DDpp are encompassedherein, as are vectors containing these nucleic acids, host cellscontaining these nucleic acids vectors, and methods of making theDDpp-albumin fusion proteins and using these nucleic acids, vectors,and/or host cells. The invention also encompasses pharmaceuticalformulations comprising a DDpp-albumin fusion protein and apharmaceutically acceptable diluent or carrier. Such formulations can beused in methods of treating, preventing, ameliorating or diagnosing adisease or disease symptom in a patient, preferably a mammal, mostpreferably a human, comprising the step of administering thepharmaceutical formulation to the patient.

Production of DDpp

The disclosed DDpp can routinely be made using commercially availablereagents and techniques known in the art. In one embodiment, the DDppare synthesized by solid phase synthesis techniques known in the art,such as, Merrifield, J. Am. Chem. Soc. 85: 2149 (1963); Davis et al.,Biochem. Intl. 10: 394-414 (1985); Larsen et al., J. Am. Chem. Soc. 115:6247 (1993); Smith et al., J. Peptide Protein Res. 44: 183 (1994);O'Donnell et al., J. Am. Chem. Soc. 118: 6070 (1996); Stewart and Young,Solid Phase Peptide Synthesis, Freeman (1969); Finn et al., TheProteins, 3.sup.rd ed., 2: 105-253 (1976); and Erickson et al., TheProteins, 3.sup.rd ed., 2: 257-527 (1976). The disclosure contemplatessynthetic peptides. Alternatively, the peptide is expressedrecombinantly by introducing a nucleic acid encoding the disclosed DDppinto host cells, which are cultured to express the peptide. Suchpeptides are purified from the culture media or cell pellets.

The production of the DDpp, useful in practicing the provided methods,may be carried out using a variety of standard techniques for chemicalsynthesis, semi-synthetic methods, and recombinant DNA methodologiesknown in the art. Also provided is a method for producing a DDpp,individually or as part of multi-domain fusion protein, as solubleagents and cell associated proteins.

Optionally, the reference sequence and/or the modified polypeptides(e.g., DDpp) can be de-immunized. For example, residues or motifs thatare potentially immunogenic can be identified and modified in order toreduce or eliminate potential immune responses to the DDpp. Additionaldetails regarding various embodiments, of the production, selection, andisolation of DDpp are provided in more detail below.

Recombinant Expression of DDpp

In some embodiments, a DDpp such as a DDpp fusion protein is“recombinantly produced,” (i.e., produced using recombinant DNAtechnology). Exemplary recombinant methods available for synthesizingDDpp fusion proteins, include, but are not limited to polymerase chainreaction (PCR) based synthesis, concatemerization, seamless cloning, andrecursive directional ligation (RDL) (see, e.g., Meyer et al.,Biomacromolecules 3: 357-367 (2002); Kurihara et al., Biotechnol. Lett.27: 665-670 (2005); Haider et al., Mol. Pharm. 2: 139-150 (2005); andMcMillan et al., 32: 3643-3646 (1999); the contents of each of which isherein incorporated by reference in its entirety).

Nucleic acids comprising a polynucleotide sequence encoding a DDpp arealso provided. Such polynucleotides optionally further comprise, one ormore expression control elements. For example, the polynucleotide cancomprise one or more promoters or transcriptional enhancers, ribosomalbinding sites, transcription termination signals, and polyadenylationsignals, as expression control elements. The polynucleotide can beinserted within any suitable vector, which can be contained within anysuitable host cell for expression.

The expression of nucleic acids encoding DDpp is typically achieved byoperably linking a nucleic acid encoding the DDpp to a promoter in anexpression vector. Typical expression vectors contain transcription andtranslation terminators, initiation sequences, and promoters useful forregulation of the expression of the desired nucleic acid sequence.Methods known in the art can be used to routinely construct expressionvectors containing the nucleic acid sequence encoding a DDpp along withappropriate transcriptional/translational control signals. These methodsinclude, but are not limited to in vitro recombinant DNA techniques,synthetic techniques and in vivo recombination/genetic recombination.The expression of the polynucleotide can be performed in any suitableexpression host known in the art including, but not limited to bacterialcells, yeast cells, insect cells, plant cells or mammalian cells. In oneembodiment, a nucleic acid sequence encoding a DDpp is operably linkedto a suitable promoter sequence such that the nucleic acid sequence istranscribed and/or translated into DDpp in a host. Promoters useful forexpression in E. coli, include but are not limited to, the T7 promoter.

In one embodiment, a vector comprising a DDpp encoding nucleic acid isintroduced into a host cell (e.g., phagemid) for expression of a DDpp.The vector can remain episomal or become chromosomally integrated, aslong as the insert encoding therapeutic agent can be transcribed.Vectors can be constructed by standard recombinant DNA technology.Vectors can be plasmids, phages, cosmids, phagemids, viruses, or anyother types known in the art, which are used for replication andexpression in prokaryotic or eukaryotic cells. It will be appreciated byone of skill in the art that a wide variety of components known in theart (such as expression control elements) can be included in suchvectors, including a wide variety of transcription signals, such aspromoters and other sequences that regulate the binding of RNApolymerase onto the promoter. Any promoter known or demonstrated to beeffective in the cells in which the vector will be expressed can be usedto initiate expression of the DDpp. Suitable promoters can be inducible(e.g., regulated) or constitutive. Non-limiting examples of suitablepromoters include the SV40 early promoter region, the promoter containedin the 3′ long terminal repeat of Rous sarcoma virus, the HSV-1 (herpessimplex virus-1) thymidine kinase promoter, the regulatory sequences ofthe metallothionein gene, etc., as well as the following animaltranscriptional control regions, which exhibit tissue specificity andhave been utilized in transgenic animals: elastase I gene control regionwhich is active in pancreatic acinar cells; insulin gene control regionwhich is active in pancreatic beta cells, mouse mammary tumor viruscontrol region which is active in testicular, breast, lymphoid and mastcells, albumin gene control region which is active in liver,alpha-fetoprotein gene control region which is active in liver, alpha1-antitrypsin gene control region which is active in the liver,beta-globin gene control region which is active in erythroid cells,myelin basic protein gene control region which is active inoligodendrocyte cells in the brain, myosin light chain-2 gene controlregion which is active in skeletal muscle, and gonadotropin releasinghormone gene control region which is active in the hypothalamus. In aparticular embodiment, the promoter is an immunoglobulin gene controlregion which is active in lymphoid cells.

In one embodiment, one or several nucleic acids encoding a DDpp isexpressed under the control of a constitutive promoter or, alternately,a regulated expression system. Suitable regulated expression systemsinclude, but are not limited to, a tetracycline-regulated expressionsystem, an ecdysone inducible expression system, a lac-switch expressionsystem, a glucocorticoid-inducible expression system, atemperature-inducible promoter system, and a metallothioneinmetal-inducible expression system. If several different nucleic acidsencoding a DDpp are contained within the host cell system, some of thenucleic acids may be expressed under the control of a constitutivepromoter, while others may be expressed under the control of a regulatedpromoter. Expression levels may be determined by methods known in theart, including Western blot analysis and Northern blot analysis.

A variety of host-expression vector systems can be utilized to express anucleic acid encoding a DDpp. Vectors containing the nucleic acidsencoding the DDpp (e.g., individual DD subunits or DDpp fusions) orportions or fragments thereof, include plasmid vectors, a single anddouble-stranded phage vectors, as well as single and double-stranded RNAor DNA viral vectors. Phage and viral vectors may also be introducedinto host cells in the form of packaged or encapsulated virus usingknown techniques for infection and transduction. Moreover, viral vectorsmay be replication competent or alternatively, replication defective.Alternatively, cell-free translation systems may also be used to producethe protein using RNAs derived from the DNA expression constructs (see,e.g., WO86/05807 and WO89/01036; and U.S. Pat. No. 5,122,464; thecontents of each of which is herein incorporated by reference in itsentirety).

Generally, any type of cells or cultured cell line can be used toexpress a DDpp provided herein. In some embodiments, the background cellline used to generate an engineered host cells is a phage, a bacterialcell, a yeast cell or a mammalian cell. A variety of host-expressionvector systems may be used to express the coding sequence a DDpp fusionprotein. Mammalian cells can be used as host cell systems transfectedwith recombinant plasmid DNA or cosmid DNA expression vectors containingthe coding sequence of the target of interest and the coding sequence ofthe fusion polypeptide.

The cells can be primary isolates from organisms (including human),cultures, or cell lines of transformed or transgenic nature. In someembodiments, the host cell is a human cell. In some embodiments, thehost cell is human T cell. In some embodiments, the host cell is derivedfrom a human patient.

Useful host cells include but are not limited to microorganisms such as,bacteria (e.g., E. coli, B. subtilis) transformed with recombinantbacteriophage DNA, plasmid DNA or cosmid DNA expression vectorscontaining DDpp coding sequences; yeast (e.g., Saccharomyces, Pichia)transformed with recombinant yeast expression vectors containing DDppcoding sequences; insect cell systems infected with recombinant virusexpression vectors (e.g., baculovirus) containing DDpp coding sequences;plant cell systems infected with recombinant virus expression vectors(e.g., cauliflower mosaic virus, CaMV; tobacco mosaic virus, TMV) ortransformed with recombinant plasmid expression vectors (e.g., Tiplasmid) containing DDpp coding sequences. In particular embodiments,the mammalian cell systems are used to produce the DDpp. Mammalian cellsystems typically utilize recombinant expression constructs containingpromoters derived from the genome of mammalian cells (e.g.,metallothionein promoter) or from mammalian viruses (e.g., theadenovirus late promoter; the vaccinia virus 7.5K promoter).

Prokaryotes useful as host cells in producing a DDpp such as DDpp fusionprotein, include gram negative or gram positive organisms such as, E.coli and B. subtilis. Expression vectors for use in prokaryotic hostcells generally contain one or more phenotypic selectable marker genes(e.g., genes encoding proteins that confer antibiotic resistance or thatsupply an autotrophic requirement). Examples of useful prokaryotic hostexpression vectors include the pKK223-3 (Pharmacia, Uppsala, Sweden),pGEMI (Promega, Wis., USA), pET (Novagen, Wis., USA) and pRSET(Invitrogen, Calif., USA) series of vectors (see, e.g., Studier, J. Mol.Biol. 219: 37 (1991) and Schoepfer, Gene 124: 83 (1993)). Exemplarypromoter sequences frequently used in prokaryotic host cell expressionvectors include T7, (Rosenberg et al., Gene 56: 125-135 (1987)),beta-lactamase (penicillinase), lactose promoter system (Chang et al.,Nature 275: 615 (1978)); and Goeddel et al., Nature 281: 544 (1979)),tryptophan (trp) promoter system (Goeddel et al., Nucl. Acids Res. 8:4057 (1980)), and tac promoter (Sambrook et al., 1990, MolecularCloning, A Laboratory Manual, 2d Ed., Cold Spring Harbor Laboratory,Cold Spring Harbor, N.Y.).

In one embodiment, a eukaryotic host cell systems is be used, includingyeast cells transformed with recombinant yeast expression vectorscontaining the coding sequence of a DDpp, such as, the expressionsystems taught in U.S. Appl. No. 60/344,169 and WO03/056914 (methods forproducing humanlike glycoprotein in a non-human eukaryotic host cell)(the contents of each of which is herein incorporated by reference inits entirety). Exemplary yeast that can be used to produce the providedcompositions, such as, DD, include yeast from the genus Saccharomyces,Pichia, Actinomycetes and Kluyveromyces. Yeast vectors typically containan origin of replication sequence from a 2mu yeast plasmid, anautonomously replicating sequence (ARS), a promoter region, sequencesfor polyadenylation, sequences for transcription termination, and aselectable marker gene. Examples of promoter sequences in yeastexpression constructs include, promoters from metallothionein,3-phosphoglycerate kinase (Hitzeman, J. Biol. Chem. 255: 2073 (1980))and other glycolytic enzymes, such as, enolase,glyceraldehyde-3-phosphate dehydrogenase, hexokinase, pyruvatedecarboxylase, phosphofructokinase, glucose-6-phosphate isomerase,3-phospho glycerate mutase, pyruvate kinase, triosephosphate isomerase,phosphoglucose isomerase, and glucokinase. Additional suitable vectorsand promoters for use in yeast expression as well as yeasttransformation protocols are known in the art. See, e.g., Fleer, Gene107: 285-195 (1991) and Hinnen, PNAS 75: 1929 (1978).

Insect and plant host cell culture systems are also useful for producingthe compositions encompassed by the disclosure. Such host cell systemsinclude for example, insect cell systems infected with recombinant virusexpression vectors (e.g., baculovirus) containing the coding sequence ofa DD; plant cell systems infected with recombinant virus expressionvectors (e.g., cauliflower mosaic virus, CaMV; tobacco mosaic virus,TMV) or transformed with recombinant plasmid expression vectors (e.g.,Ti plasmid) containing the coding sequence of a DD, including, but notlimited to, the expression systems taught in U.S. Pat. No. 6,815,184;U.S. Publ. Nos. 60/365,769, and 60/368,047; and WO04/057002,WO04/024927, and WO03/078614; the contents of each of which is hereinincorporated by reference in its entirety.

In an additional embodiment the host cell systems may be used, includinganimal cell systems infected with recombinant virus expression vectors(e.g., adenoviruses, retroviruses, adeno-associated viruses, herpesviruses, lentiviruses) including cell lines engineered to containmultiple copies of the DNA encoding a DDpp either stably amplified(CHO/dhfr) or unstably amplified in double-minute chromosomes (e.g.,murine cell lines). In one embodiment, the vector comprising thepolynucleotide(s) encoding the DDpp is polycistronic. Exemplarymammalian cells useful for producing these compositions include 293cells (e.g., 293T and 293F), CHO cells, BHK cells, NS0 cells, SP2/0cells, YO myeloma cells, P3X63 mouse myeloma cells, PER cells, PER.C6(Crucell, Netherlands) cells VERY, Hela cells, COS cells, MDCK cells,3T3 cells, W138 cells, BT483 cells, Hs578T cells, HTB2 cells, BT20cells, T47D cells, CRL7030 cells, HsS78Bst cells, hybridoma cells, andother mammalian cells. Additional exemplary mammalian host cells thatare useful in practicing the the provided embodiments include but arenot limited, to T cells. Some examples of expression systems andselection methods are described in the following references andreferences cited therein: Borth et al., Biotechnol. Bioen. 71(4): 266-73(2000), in Werner et al., Arzneimittel-forschung/Drug Res. 48(8): 870-80(1998), Andersen et al., Curr. Op. Biotechnol. 13: 117-123 (2002), Chaddet al., Curr. Op. Biotechnol. 12: 188-194 (2001), and Giddings, Curr.Op. Biotechnol. 12: 450-454 (2001). Additional examples of expressionsystems and selection methods are described in Logan et al., PNAS 81:355-359 (1984), Birtner et al., Methods Enzymol. 153: 51-544 (1987)).Transcriptional and translational control sequences for mammalian hostcell expression vectors are frequently derived from viral genomes.Commonly used promoter sequences and enhancer sequences in mammalianexpression vectors include, sequences derived from Polyoma virus,Adenovirus 2, Simian Virus 40 (SV40), and human cytomegalovirus (CMV).Exemplary commercially available expression vectors for use in mammalianhost cells include pCEP4 (Invitrogen) and pcDNA3 (Invitrogen).

Physical methods for introducing a nucleic acid into a host cell (e.g.,a mammalian host cell) include calcium phosphate precipitation,lipofection, particle bombardment, microinjection, electroporation, andthe like. Methods for producing cells comprising vectors and/orexogenous nucleic acids are well-known in the art. See, for example,Sambrook et al. (2001, Molecular Cloning: A Laboratory Manual, ColdSpring Harbor Laboratory, New York).

Biological methods for introducing a polynucleotide of interest into ahost cell include the use of DNA and RNA vectors. Viral vectors, andespecially retroviral vectors, have become the most widely used methodfor inserting genes into mammalian (e.g., human) cells. Other viralvectors can be derived from lentivirus, poxviruses, herpes simplex virusI, adenoviruses and adeno-associated viruses, and the like. See, forexample, U.S. Pat. Nos. 5,350,674 and 5,585,362, the contents of each ofwhich is herein incorporated by reference in its entirety.

Methods for introducing a DNA and RNA polynucleotides of interest into ahost cell include electroporation of cells, in which an electrical fieldis applied to cells in order to increase the permeability of the cellmembrane, allowing chemicals, drugs, or polynucleotides to be introducedinto the cell. DDpp containing DNA or RNA constructs may be introducedinto mammalian or prokaryotic cells using electroporation.

In a preferred embodiment, electroporation of cells results in theexpression of a DDpp-CAR on the surface of T cells, NK cells, NKT cells.Such expression may be transient or stable over the life of the cell.Electroporation may be accomplished with methods known in the artincluding MaxCyte GT® and STX® Transfection Systems (MaxCyte,Gaithersburg, Md., USA).

Chemical means for introducing a polynucleotide into a host cell includecolloidal dispersion systems, such as macromolecule complexes,nanocapsules, microspheres, beads, and lipid-based systems includingolLin-water emulsions, micelles, mixed micelles, and liposomes. Anexemplary colloidal system for use as a delivery vehicle in vitro and invivo is a liposome (e.g., an artificial membrane vesicle). In the casewhere a non-viral delivery system is utilized, an exemplary deliveryvehicle is a liposome. The use of lipid formulations is contemplated forthe introduction of the nucleic acids into a host cell (in vitro, exvivo or in vivo). In another aspect, the nucleic acid can be associatedwith a lipid. The nucleic acid associated with a lipid can beencapsulated in the aqueous interior of a liposome, interspersed withinthe lipid bilayer of a liposome, attached to a liposome via a linkingmolecule that is associated with both the liposome and theoligonucleotide, entrapped in a liposome, complexed with a liposome,dispersed in a solution containing a lipid, mixed with a lipid, combinedwith a lipid, contained as a suspension in a lipid, contained orcomplexed with a micelle, or otherwise associated with a lipid. Lipid,lipid/DNA or lipid/expression vector associated compositions are notlimited to any particular structure in solution. For example, they canbe present in a bilayer structure, as micelles, or with a “collapsed”structure. They can also simply be interspersed in a solution, possiblyforming aggregates that are not uniform in size or shape. Lipids arefatty substances which can be naturally occurring or synthetic lipids.For example, lipids include the fatty droplets that naturally occur inthe cytoplasm as well as the class of compounds which contain long-chainaliphatic hydrocarbons and their derivatives, such as fatty acids,alcohols, amines, amino alcohols, and aldehydes.

Lipids suitable for use can be obtained from commercial sources. Forexample, dimyristoyl phosphatidylcholine (“DMPC”) can be obtained fromSigma, St. Louis, Mo.; dicetyl phosphate (“DCP”) can be obtained from K& K Laboratories (Plainview, N.Y.); cholesterol (“Choi”) can be obtainedfrom Calbiochem-Behring; dimyristoyl phosphatidylglycerol (“DMPG”) andother lipids may be obtained from Avanti Polar Lipids, Inc. (Birmingham,Ala.). Stock solutions of lipids in chloroform or chloroform/methanolcan be stored at about −20° C. Chloroform may be used as the onlysolvent since it is more readily evaporated than methanol. “Liposome” isa generic term encompassing a variety of single and multilamellar lipidvehicles formed by the generation of enclosed lipid bilayers oraggregates. Liposomes can be characterized as having vesicularstructures with a phospholipid bilayer membrane and an inner aqueousmedium. Multilamellar liposomes have multiple lipid layers separated byaqueous medium. They form spontaneously when phospholipids are suspendedin an excess of aqueous solution. The lipid components undergoself-rearrangement before the formation of closed structures and entrapwater and dissolved solutes between the lipid bilayers (Ghosh et al.,Glycobiology 5: 505-510 (1991)). However, compositions that havedifferent structures in solution than the normal vesicular structure arealso encompassed. For example, the lipids can assume a micellarstructure or merely exist as non-uniform aggregates of lipid molecules.Also contemplated are lipofectamine-nucleic acid complexes.

Regardless of the method used to introduce exogenous nucleic acids intoa host cell, or the presence of the recombinant nucleic acid sequence inthe host cell can routinely be confirmed through a variety of assaysknown in the art. Such assays include, for example, “molecularbiological” assays known in the art, such as Southern and Northernblotting, RT-PCR and PCR; “biochemical” assays, such as detecting thepresence or absence of a particular peptide, e.g., by immunologicalmeans (ELISAs and Western blots) or by assays described herein toidentify agents falling within the scope of the provided embodiments.

Reporter genes are used for identifying potentially transfected cellsand for evaluating the functionality of regulatory sequences. Ingeneral, a reporter gene is a gene that is not present in or expressedby the recipient organism, tissue, or cell and that encodes apolypeptide whose expression is manifested by some easily detectableproperty, e.g., enzymatic activity. Expression of the reporter gene isassayed at a suitable time after the DNA has been introduced into therecipient cells. A non-limiting list of suitable reporter genes caninclude genes encoding luciferase, beta-galactosidase, chloramphenicolacetyl transferase, secreted alkaline phosphatase, or the greenfluorescent protein gene (e.g., Ui-Tei et al., FEBS Lett. 479: 79-82(2000)). Suitable expression systems are known in the art and can beprepared using known techniques or obtained commercially. In general,the construct with the minimal 5′ flanking region showing the highestlevel of expression of reporter gene is identified as the promoter. Suchpromoter regions can routinely be linked to a reporter gene and used toevaluate agents for the ability to modulate promoter-driventranscription.

A number of selection systems can be used in mammalian host-vectorexpression systems, including, but not limited to, the herpes simplexvirus thymidine kinase, hypoxanthine-guanine phosphoribosyltransferaseand adenine phosphoribosyltransferase (Lowy et al., Cell 22: 817 (1980))genes, which can be employed in tk⁻, hgprt⁻ or aprt cells, respectively.Additionally, antimetabolite resistance can be used as the basis ofselection for e.g., dhfr, gpt, neo, hygro, trpB, hisD, ODC (ornithinedecarboxylase), and the glutamine synthase system.

Expression of Cell Associated DDpp

In another embodiment, the production of DDpp results in cell associatedDDpp compositions. For example, the expression of recombinant vectorsthat encode DDpp operably linked to a cell membrane anchor ortransmembrane domain have the potential to remain cell associated. DDppcomprising chimeric antigen receptors are intentionally cell associatedand used in the context of the cell in which they are expressed. Oneparticular embodiment relates to a strategy of adoptive cell transfer ofT cells which have been transduced to express a DDpp chimeric antigenreceptor (CAR). Preferably, the cell can be genetically modified tostably express a DDpp on its surface, conferring novel targetspecificity that is MHC independent.

A variety of viral-derived vectors can be used in applications in whichviruses are used for transfection and integration into a mammalian cellgenome. Viruses, which are useful as vectors include, but are notlimited to, retroviruses, adenoviruses, adeno-associated viruses, herpesviruses, and lentiviruses. Lentiviral vectors are particularly suitableto achieving long-term gene transfer (e.g., adoptive T cell immunetherapy) since they allow long-term, stable integration of a transgeneand its propagation in daughter cells. Lentiviral vectors have the addedadvantage over vectors derived from onco-retroviruses such as murineleukemia viruses in that they can transduce non-proliferating cells,such as hepatocytes. They also have the added advantage of lowimmunogenicity. In general, a suitable vector contains an origin ofreplication functional in at least one organism, a promoter sequence,convenient restriction endonuclease sites, and one or more selectablemarkers, (e.g., WO01/96584 and WO01/29058; and U.S. Pat. No. 6,326,193).Several vector promoter sequences are available for expression of thetransgenes. One example of a suitable promoter is the immediate earlycytomegalovirus (CMV) promoter sequence. This promoter sequence is astrong constitutive promoter sequence capable of driving high levels ofexpression of any polynucleotide sequence operatively linked thereto.Another example of a suitable promoter is EFla. However, otherconstitutive promoter sequences can also be used, including, but notlimited to the simian virus 40 (SV40) early promoter, mouse mammarytumor virus (MMTV), human immunodeficiency virus (HIV) long terminalrepeat (LTR) promoter, MoMuLV promoter, an avian leukemia viruspromoter, an Epstein-Barr virus immediate early promoter, a Rous sarcomavirus promoter, as well as human gene promoters such as, but not limitedto, the actin promoter, the myosin promoter, the hemoglobin promoter,and the creatine kinase promoter. Inducible promoters include, but arenot limited to a metallothionein promoter, a glucocorticoid promoter, aprogesterone promoter, and a tetracycline promoter.

In order to assess the expression of a DDpp-CAR polypeptide or portionsthereof, the expression vector to be introduced into a cell can alsocontain either a selectable marker gene or a reporter gene or both tofacilitate identification and selection of expressing cells from thepopulation of cells sought to be transfected or infected through viralvectors, in other aspects, the selectable marker may be carried on aseparate piece of DNA and used in a co-transfection procedure. Bothselectable markers and reporter genes may be flanked with appropriateregulatory sequences to enable expression in the host cells. Usefulselectable markers include, for example, antibiotic-resistance genes,such as neo and the like.

Prior to expansion and genetic modification of the T cells, a source ofT cells is obtained from a subject. T cells can be obtained from anumber of sources, including peripheral blood mononuclear cells, bonemarrow, lymph node tissue, cord blood, thymus tissue, tissue from a siteof infection, ascites, pleural effusion, spleen tissue, and tumors. Invaroius embodiments, any number of T cell lines available in the art,may be used.

A full discussion of T cell isolation, culturing, activation andexpansion methods may be found in WO/12079000, the contents of which isherein incorporated by reference in its entirety.

Additionally provided is a host cell comprising nucleic acids encoding aDDpp described herein. Compositions comprising a nucleic acid sequenceencoding the DDpp are also provided.

“Co-express” as used herein refers to simultaneous expression of two ormore protein coding sequences. The coding sequences may be nucleic acidsencoding, for example, a single protein or a chimeric protein as asingle polypeptide chain.

Chemical Synthesis of DDpp

In addition to recombinant methods, DDpp production may also be carriedout using organic chemical synthesis of the desired polypeptide using avariety of liquid and solid phase chemical processes known in the art.Various automatic synthesizers are commercially available and can beused in accordance with known protocols. See, for example, Tam et al.,J. Am. Chem. Soc. 105: 6442 (1983); Merrifield, Science 232: 341-347(1986); Barany and Merrifield, The Peptides, Gross and Meienhofer, eds,Academic Press, New York, 1-284; Barany et al., Int. J. Pep. ProteinRes. 30: 705-739 (1987); Kelley et al. in Genetic Engineering Principlesand Methods, Setlow, J. K., ed. Plenum Press, N Y. 1990, vol. 12, pp.1-19; Stewart et al., Solid-Phase Peptide Synthesis, W.H. Freeman Co.,San Francisco, 1989. One advantage of these methodologies is that theyallow for the incorporation of non-natural amino acid residues into thesequence of the DDpp.

The DDpp that are used in the methods ecompassed herein may be modifiedduring or after synthesis or translation, e.g., by glycosylation,acetylation, benzylation, phosphorylation, amidation, pegylation,formylation, derivatization by known protecting/blocking groups,proteolytic cleavage, linkage to an antibody molecule, hydroxylation,iodination, methylation, myristoylation, oxidation, pegylation,proteolytic processing, phosphorylation, prenylation, racemization,selenoylation, sulfation, ubiquitination, etc. (See, e.g., Creighton,Proteins: Structures and Molecular Properties, 2d Ed. (W.H. Freeman andCo., N.Y., 1992); Postranslational Covalent Modification of Proteins,Johnson, ed. (Academic Press, New York, 1983), pp. 1-12; Seifter, Meth.Enzymol. 182: 626-646 (1990); Rattan, Ann. NY Acad. Sci. 663: 48-62(1992).) In specific embodiments, the peptides are acetylated at theN-terminus and/or amidated at the C-terminus.

The disclosure also provides DDpp derivatives and include polypeptidesthat have been chemically modified in some manner distinct fromaddition, deletion, or substitution of amino acids. In this regard, aDDpp is chemically bonded with polymers, lipids, other organic moieties,and/or inorganic moieties. Examplary polypeptide modifications areprovided in Hermanson, Bioconjugate Techniques, Academic Press, (1996).The DDpp optionally comprise a functional group that facilitatesconjugation to another moiety (e.g., a peptide moiety). Exemplaryfunctional groups include, but are not limited to, isothiocyanate,isocyanate, acyl azide, NHS ester, sulfonyl chloride, aldehyde, epoxide,oxirane, carbonate, arylating agent, imidoester, carbodiimide,anhydride, alkyl halide derivatives (e.g., haloacetyl derivatives),maleimide, aziridine, acryloyl derivatives, arylating agents,thiol-disulfide exchange reagents (e.g., pyridyl disulfides or TNBthiol), diazoalkane, carboyldiimadazole, N,N′-Disuccinyl carbonate,N-Hydroxysuccinimidyl chloroformate, and hydrazine derivatives.Maleimide is useful, for example, for generating a DDpp that bindsalbumin in vivo.

In some embodiments, the DDpp is covalently modified to include one ormore water soluble polymer attachments. The water soluble polymer (orother chemical moiety) is attached to any amino acid residue, althoughattachment to the N- or C-terminus is preferred in some embodiments.Useful polymers include, but are not limited to, PEG (e.g., PEGapproximately 40 kD, 30 kD, 20 kD, 10 kD, 5 kD, or 1 kD in size),polyoxyethylene glycol, polypropylene glycol, monomethoxy-polyethyleneglycol, dextran, hydroxyethyl starch, cellulose, poly-(N-vinylpyrrolidone)-polyethylene glycol, propylene glycol homopolymers, apolypropylene oxide/ethylene oxide co-polymer, polysialic acid (PSA),polyoxyethylated polyols (e.g., glycerol) and polyvinyl alcohol, as wellas mixtures of any of the foregoing. In one embodiment, the DDpp isPEGylated. PEG moieties are available in different shapes, e.g., linearor branched. For further discussion of water soluble polymerattachments, see U.S. Pat. Nos. 4,640,835; 4,496,689; 4,301,144;4,670,417; 4,791,192; and 4,179,337. Other moieties useful for improvingpeptide half-life or stability are described herein and include, forinstance, albumin (optionally modified to allow conjugation to theDDpp), fatty acid chains (e.g., C12-C18 fatty acid, such as a C14 fattyacid, or dicarboxylic acids, such as octadecane dicarboxylic acid(oddc)), an antibody or fragment thereof (e.g., an Fc portion of anantibody), and proline-alanine-serine multimers.

In some embodiments, the DDpp is conjugated to a polyethylene glycol(PEG) moiety, human serum albumin (HSA), an antibody or antibodyfragment, hydroxyethyl starch, a proline-alanine-serine multimer(PASylation), a C12-C18 fatty acid, or polysialic acid.

In some embodiments, the DDpp are acylated at the N-terminal amino acidof the peptide. In another aspect, the DDpp are amidated at theC-terminal amino acid of the polypeptide. In a still further aspect, thepeptides are acylated at the N-terminal amino acid of the peptide andare amidated at the C-terminal amino acid of the peptide.

In some embodiments, the DDpp comprises one or more modified ornon-proteinogenic amino acids or a modified linker group (see, e.g.,Grant, Synthetic Peptides: A User's Guide, Oxford University Press(1992)). Modified amino acids include, for example, amino acids whereinthe amino and/or carboxyl group is replaced by another group.Non-limiting examples include modified amino acids incorporatingthioamides, ureas, thioureas, acylhydrazides, esters, olefines,sulfonamides, phosphoric acid amides, ketones, alcohols, boronic acidamides, benzodiazepines and other aromatic or non-aromatic heterocycles(see, Estiarte et al., Burgers Medicinal Chemistry, 6.sup.th edition,Volume 1, Part 4, John Wiley & Sons, New York (2002)). Non-proteinogenicamino acids include, but are not limited, to beta-alanine (Bal),norvaline (Nva), norleucine (Nie), 4-aminobutyric acid (gamma-Abu),2-aminoisobutyric acid (Aib), 6-aminohexanoic acid (epsilon-Ahx),ornithine (Orn), hydroxyproline (Hyp), taurine, sarcosine, citrulline(Cit), cysteic acid (Coh), cyclohexylalanine (Cha), methioninesulfoxide(Meo), methioninesulfone (Moo), homoserine-methylester (Hsm),propargylglycine (Eag), 5-fluorotryptophan (5Fw), 6-fluorotryptophan(6Fw), 3′,4′-dimethoxyphenyl-alanine (Ear), 3′,4′-difluorophenylalanine(Dff), 4′-fluorophenyl-alanine (Pff), 1-naphthyl-alanine (1Ni),2-Naphthylalanine (2Ni), 1-methyltryptophan (1Mw), penicillamine (Pen),homoserine (Hse), t-butylglycine, t-butylalanine, phenylglycine (Phg),benzothienylalanine (Bta), L-homo-cysteine (Hcy), N-methyl-phenylalanine(Nmf), 2-thienylalanine (Thi), 3,3-diphenylalanine (Ebw),L-alpha-t-Butylglycine (Tle), Bpa, homophenylalanine (Hfe), andS-benzyl-L-cysteine (Ece). These and other non-proteinogenic amino acidsmay exist as D- or L-isomers. Examples of modified linkers include butare not limited to the flexible linker4,7,10-trioxa-1,13-tridecanediamine (Ttds), glycine, 6-aminohexanoicacid, beta-alanine (Bal), pentynoic acid (Pyn), and combinations ofTtds, glycine, 6-aminohexanoic acid and Bal.

Any of numerous chemical modifications may be carried out by knowntechniques, including, but not limited to acetylation, formylation, etc.Additionally, the derivative may contain one or more non-classical aminoacids.

TABLE 1 Exemplary target-specific binding DDs SEQ NO: D-Domain SequenceTarget ELISA_avg 11 MGSWYEFSWRLQAIHQRLNALGGSEAELAAFEKEIAAFESE BCMA9.48683 LQAYKGKGNPEVEELRAYAAGIRGALQAYRHN 12MGSWHEFTWRLIAIQQRLEALGGSEAELAAFEKEIAAFESE BCMA 17.125LQAYKGKGNPEVEELRAYAAGIRHHLQAYRHN 13MGSWREFAWRLVAINSRLKALGGSEAELAAFEKEIAAFESE BCMA 9.66LQAYKGKGNPEVEELRHYAASIRDGLQAYRHN 14MGSWHEFAWRLQAINQRLNALGGSEAELAAFEKEIAAFESE BCMA 13.14LQAYKGKGNPEVEELRHYAAHIRNGLQAYRHN 15MGSWNEFAWRLTAIEQRLMALGGSEAELAAFEKEIAAFESE BCMA 18.28LQAYKGKGNPEVEELRHYAAGIRDNLQAYRHN 16MGSWTEFAWRLQAIHQRLQALGGSEAELAAFEKEIAAFESE BCMA 18.71LQAYKGKGNPEVEELRVYAAKIRISLQAYRHN 17MGSWIEFAWRLQAIHQRLDALGGSEAELAAFEKEIAAFESE BCMA 18.97LQAYKGKGNPEVEDLREYAANIRDSLQAYRHN 18MGSWHEFTWRLVAIQQRLQALGGSEAELAAFEKEIAAFESE BCMA 19.51LQAYKGKGNPEVEELRKFAAKIRYELQAYRHN 19MGSWHEFTWRLIAIRERLFALGGSEAELAAFEKEIAAFESE BCMA 12.99LQAYKGKGNPEVEELREYAASIRNMLQAYRHN 20MGSWIEFSWRLEAIRQRLQALGGSEAELAAFEKEIAAFESE BCMA 9.92LQAYKGKGNPEVESLRSYAARIRQELQAYRHN 21MGSWVEFSWRLEAIRQRLQALGGSEAELAAFEKEIAAFESE BCMA 19.14LQAYKGKGNPEVESLRSYAARIRQELQAYRHN 22MGSWVEFSWRLEAIRQRLTALGGSEAELAAFEKEIAAFESE BCMA 21.3LQAYKGKGNPEVEDLRKYAARIRGELQAYRHN 23MGSWVEFAWRLTAIDQRLSALGGSEAELAAFEKEIAAFESE BCMA 8.43LQAYKGKGNPEVENLRFYAAKIRSHLQAYRHN 24MGSWVEFAWRLEAIKQRLTALGGSEAELAAFEKEIAAFESE BCMA 8.9LQAYKGKGNPEVEELRLYAAKIRRVLQAYRHN 25MGSWVEFAWRLTAIHTRLWALGGSEAELAAFEKEIAAFESE BCMA 6.08LQAYKGKGNPEVESLRKYAAKIRKQLQAYRHN 26MGSWTEFAWRLEAINQRLQALGGSEAELAAFEKEIAAFESE BCMA 15.1475LQAYKGKGKPEVEALRAYAAKIRTRLQAYRHN 27MGSWSEFAWRLEAIHQRLSALGGSEAELAAFEKEIAAFESE BCMA 18.04LQAYKGKGNPEVESLRLFAAQIRENLQAYRHN 28MGSWNEFAWRLIAINQRLWALGGSEAELAAFEKEIAAFESE BCMA 11.53LQAYKGKGNPEVESLRHFAANIRNDLQAYRHN 29MGSWTEFAWRLIAIDQRLMALGGSEAELAAFEKEIAAFESE BCMA 8.55LQAYKGKGNPEVEILRELAAEIRFHLQAYRHN 30MGSWSEFMNRLDAITYRLVALGGSEAELAAFEKEIAAFESE BCMA 12.9LQAYKGKGNPEVELLRHYAAQIRDSLQAYRHN 31MGSWTEFMERLDAISYRLWALGGSEAELAAFEKEIAAFESE BCMA 9.87LQAYKGKGNPEVEVLRDYAAIIRNSLQAYRHN 32MGSWAEFMDRLDAITYRLWALGGSEAELAAFEKEIAAFESE BCMA 10.83LQAYKGKGNPEVEELRGYAAIIRSELQAYRHN 33MGSWIEFQERLDAIFYRLHALGGSEAELAAFEKEIAAFESE BCMA 18.58LQAYKGKGNPEVEDLRDAAATIRRQLQAYRHN 34MGSWIEFQQRLDAIFYRLYALGGSEAELAAFEKEIAAFESE BCMA 20.02LQAYKGKGNPEVENLRDMAAIIRKQLQAYRHN 35MGSWYEFQSRLDAIFYRLFALGGSEAELAAFEKEIAAFESE BCMA 14.08LQAYKGKGNPEVEKLREAAASIRTQLQAYRHN 36MGSWSEFIDRLDAITYRLFALGGSEAELAAFEKEIAAFESE BCMA 10.18LQAYKGKGNPEVENLRWYAGVIREQLQAYRHN 37MGSWSEFYDRLYAINQRLFALGGSEAELAAFEKEIAAFESE BCMA 5.98LQAYKGKGNPEVEDLRWYAAFIRAQLQAYRHN 38MGSWYEFYDRLDAIVHRLDALGGSEAELAAFEKEIAAFESE BCMA 14.68LQAYKGKGNPEVENLRWYAAMIRVRLQAYRHN 39MGSWVEFQDRLEAITDRLYALGGSEAELAAFEKEIAAFESE BCMA 8.87825LQAYKGKGNPEVEELRYSAAMIRVILQAYRHN 40MGSWVEFQERLMAISDRLYALGGSEAELAAFEKEIAAFESE BCMA 6.7LQAYKGKGNPEVEELRWQAAMIRYTLQAYRHN 41MGSWFEFQHRLEAISMRLHALGGSEAELAAFEKEIAAFESE BCMA 4.05LQAYKGKGNPEVEELRWQAAYIRVVLQAYRHN 42MGSWVEFQSRLEAIATRLRALGGSEAELAAFEKEIAAFESE BCMA 18.0075LQAYKGKGNPEVEELRWQAAWIRMMLQAYRHN 43MGSWEEFQYRLGAIAARLQALGGSEAELAAFEKEIAAFESE BCMA 3.11LQAYKGKGNPEVEELRWQAAMIRFMLQAYRHN 44MGSWYEFQVRLQAISWRLKALGGSEAELAAFEKEIAAFESE BCMA 14.23LQAYKGKGNHEVEELRIQAALIRVMLQAYRHN 45MGSWVEFRSRLEAISNRLRALGGSEAELAAFEKEIAAFESE BCMA 3.04LQAYKGKGNPEVEELRTTAALIRVYLQAYRHN 46MGSWVEFKARLEAISSRLTALGGSEAELAAFEKEIAAFESE BCMA 8.70714LQAYKGKGNPEVEELRYSAALIRVYLQAYRHN 47MGSWSEFYTRLEAINNRLHALGGSEAELAAFEKEIAAFESE BCMA 3.66LQAYKGKGNPEVEELRYTAALIRIYLQAYRHN 48MGSWAEFYHRLDAISSRLRALGGSEAELAAFEKEIAAFESE BCMA 4.31LQAYKGKGNPEVEELRYTAALIRIYLQAYRHN 49MGSWTEFASRLVAIRQRLQALGGSEAELAAFEKEIAAFESE BCMA 7.99LQAYKGKGNPEVEELRYSAAIIRVMLQAYRHN 50MGSWSEFDQRLAAIYQRLNALGGSEAELAAFEKEIAAFESE BCMA 7.72LQAYKGKGNPEVEELRYSAALIRVMLQAYRHN 51MGSWVEFHNRLSAISDRLGALGGSEAELAAFEKEIAAFESE BCMA 7.36LQAYKGKGNPEVEELRYSAALIRVMLQAYRHN 52MGSWNEFEDRLSAISARLSALGGSEAELAAFEKEIAAFESE BCMA 4.09LQAYKGKGNPEVEELRYSAALIRVMLQAYRHN 53MGSWVEFEYRLVAIFDRLQALGGSEAELAAFEKEIAAFESE BCMA 7.63LQAYKGKGNPEVEELRYQAALIRVMLQAYRHN 54MGSWVEFQGRLGAIHERLQALGGSEAELAAFEKEIAAFESE BCMA 3.83429LQAYKGKGNPEVEELRYSAALIRVFLQAYRHN 55MGSWYEFSMRLSAIWERLHALGGSEAELAAFEKEIAAFESE BCMA 7.12LQAYKGKGNPEVEELRYQAALIRFYLQAYRHN 56MGSWTEFSQRLGAISERLYALGGSEAELAAFEKEIAAFESE BCMA 4.15LQAYKGKGNPEVEELRYSAALIRFMLQAYRHN 57MGSWTEFHDRLEAITHRLNALGGSEAELAAFEKEIAAFESE BCMA 5.79LQAYKGKGNPEVEELRYSAALLRVFLQAYRHN 58MGSWTEFEHRLEAIAGRLNALGGSEAELAAFEKEIAAFESE BCMA 6.34LQAYKGKGNPEVEELRYSAALIRFWLQAYRHN 59MGSWTEFANRLEAINARLHALGGSEAELAAFEKEIAAFESE BCMA 6.42LQAYKGKGNPEVEELRFSAALIRVYLQAYRHN 60MGSWEEFDRRLYAIARRLEALGGSEAELAAFEKEIAAFESE BCMA 8.85LQAYKGKGNPEVEELRYQAALIRVWLQAYRHN 61MGSWIEFHQRLEAIVTRLEALGGSEAELAAFEKEIAAFESE BCMA 8LQAYKGKGNPEVEELRYQAALIRVFLQAYRHN 62MGSWSEFYDRLKAIADRLHALGGSEAELAAFEKEIAAFESE BCMA 8.215LQAYKGKGNPEVEELRTEAAIIRVYLQAYRHN 63MGSWWEFEDRLSAIMERLHALGGSEAELAAFEKEIAAFESE BCMA 10.39LQAYKGKGNPEVEELRYRAAIIRVYLQAYRHN 64MGSWVEFEERLAAIATRLHALGGSEAELAAFEKEIAAFESE BCMA 16.29LQAYKGKGNPEVEELRWRAAIIRVYLQAYRHN 65MGSWSEFRGRLQAIHSRLNALGGSEAELAAFEKEIAAFESE BCMA 7.585LQAYKGKGNPEVEELRYSAAIIRIYLQAYRHN 66MGSWTEFRDRLGAIYHRLDALGGSEAELAAFEKEIAAFESE BCMA 6.7LQAYKGKGNPEVEELRYQAAIIRVYLQAYRHN 67MGSWVEFYHRLEAIRYRLSALGGSEAELAAFEKEIAAFESE BCMA 7.8LQAYKGKGNPEVEELRYVAAVIRYRLQAYRHN 68MGSWVEFYDRLEAIRYRLSALGGSEAELAAFEKEIAAFESE BCMA 5.636LQAYKGKGNPEVEELRYIAAVIRYRLQAYRHN 69MGSWVEFYDRLAAIRKRLYALGGSEAELAAFEKEIAAFESE BCMA 9.76LQAYKGKGNPEVEELRFRAALIRIWLQAYRHN 70MGSWEEFSERLEAISIRLRALGGSEAELAAFEKEIAAFESE BCMA 11.26LQAYKGKGNPEVEELRVSAAIIRVWLQAYRHN 71MGSWSEFSDRLHAISDRLQALGGSEAELAAFEKEIAAFESE BCMA 6.3725LQAYKGKGNPEVEELRIQAAIIRVWLQAYRHN 72MGSWIEFSHRLEAIVDRLGALGGSEAELAAFEKEIAAFESE BCMA 18.67LQAYKGKGNPEVEELRNTAAIIRVYLQAYRHN 73MGSWEEFSDRLEAILRRLDALGGSEAELAAFEKEIAAFESE BCMA 9.08LQAYKGKGNPEVEDLRFAAAIIRVQLQAYRHN 74MGSWMEFSHRLDAIHERLYALGGSEAELAAFEKEIAAFESE BCMA 6.3LQAYKGKGNPEVEDLRFAAAIIRVQLQAYRHN 75MGSWSEFQQRLHAIRTRLYALGGSEAELAAFEKEIAAFESE BCMA 11.615LQAYKGKGNPEVEELRFEAAIIRVMLQAYRHN 76MGSWYEFQNRLGAINRRLNALGGSEAELAAFEKEIAAFESE BCMA 4.68LQAYKGKGNPEVEELRFEAAIIRVMLQAYRHN 77MGSWQEFTGRLHAIRHRLEALGGSEAELAAFEKEIAAFESE BCMA 3.315LQAYKGKGNPEVEELRFEAAYIRVWLQAYRHN 78MGSWTEFDHRLGAIWERLVALGGSEAELAAFEKEIAAFESE BCMA 9.54LQAYKGKGNPEVEELRFHAAIIRIFLQAYRHN 79MGSWTEFHVRLSAIWDRLVALGGSEAELAAFEKEIAAFESE BCMA 23.62LQAYKGKGNPEVEELRFHAAIIRIVLQAYRHN 80MGSWNEFDNRLQAIWDRLHALGGSEAELAAFEKEIAAFESE BCMA 9.87LQAYKGKGNPEVEELRFHAAMIRITLQAYRHN 81MGSWTEFHERLQAIWFRLHALGGSEAELAAFEKEIAAFESE BCMA 12.0656LQAYKGKGNPEVEELRFRAAIIRLYLQAYRHN 82MGSWNEFSGRLTAIKDRLAALGGSEAELAAFEKEIAAFESE BCMA 3.39LQAYKGKGNPEVEELRFRAAVIRLWLQAYRHN 83MGSWVEFDERLVAIWFRLHALGGSEAELAAFEKEIAAFESE BCMA 8.96LQAYKGKGNPEVEALRARAAYIRIWLQAYRHN 84MGSWSEFGQRLSAIWERLLALGGSEAELAAFEKEIAAFESE BCMA 14.01LQAYKGKGNPEVEALRADAAFIRIWLQAYRHN 85MGSWYEFEDRLVAIWIRLDALGGSEAELAAFEKEIAAFESE BCMA 4.93LQAYKGKGNPEVEELRYNAAFIRGALQAYRHN 86MGSWYEFGDRLSAIWERLAALGGSEAELAAFEKEIAAFESE BCMA 8.895LQAYKGKGNPEVEYLRTHAAEIRTILQAYRHN 87MGSWHEFYYRLEAIEQRLHALGGSEAELAAFEKEIAAFESE BCMA 3.73LQAYKGKGNPEVETLRFDAALIRIYLQAYRHN 88MGSWSEFEERLAAIGSRLFALGGSEAELAAFEKEIAAFESE BCMA 4.85LQAYKGKGNPEVETLRFDAALIRIYLQAYRHN 89MGSWLEFHYRLHAIQFRLYALGGSEAELAAFEKEIAAFESE BCMA 12.7486LQAYKGKGNPEVETLRHIAALIRNQLQAYRHN 90MGSWQEFYNRLEAIHMRLFALGGSEAELAAFEKEIAAFESE BCMA 6.47LQAYKGKGNPEVEGLRSDAAPIRDVLQAYRHN 91MGSWNEFHHRLWAIFDRLGALGGSEAELAAFEKEIAAFESE BCMA 3.88LQAYKGKGNPEVEVLRKMAAGIRGGLQAYRHN 92MGSWYEFHYRLKAINDRLYALGGSEAELAAFEKEIAAFESE BCMA 6.04LQAYKGKGNPEVEYLRYSAAMIRHKLQAYRHN 93MGSWTEFHQRLGAIHARLGALGGSEAELAAFEKEIAAFESE BCMA 8.87LQAYKGKGNPEVEYLRFSAAFIRLKLQAYRHN 94MGSWFEFQYRLEAIFYRLLALGGSEAELAAFEKEIAAFESE BCMA 17.31LQAYKGKGKPEVEELRVRAALIRHLLQAYRHN 95MGSWVEFHARLDAIYTRLGALGGSEAELAAFEKEIAAFESE BCMA 3.8LQAYKGKGNPEVEYLRVLAAHIRISLQAYRHN 96MGSWVEFGTRLSAIYNRLWALGGSEAELAAFEKEIAAFESE BCMA 15.425LQAYKGKGNPEVEDLRFEAAIIRIMLQAYRHN 97MGSWVEFTHRLDAIYIRLWALGGSEAELAAFEKEIAAFESE BCMA 13.9167LQAYKGKGNPEVEELRHEAAVIREELQAYRHN 98MGSWVEFHGRLAAIYVRLFALGGSEAELAAFEKEIAAFESE BCMA 4LQAYKGKGNPEVESLRYHAAMIRRNLQAYRHN 99MGSWVEFDRRLVAIYIRLWALGGSEAELAAFEKEIAAFESE BCMA 8.93LQAYKGKGNPEVEALRDDAALIRLLLQAYRHN 100MGSWVEFDRRLVAIYIRLWALGGSEAELAAFEKEIAAFESE BCMA 8LQAYKGKGNPEVEKLRYDAATIRETLQAYRHN 101MGSWLEFDRRLTAIYLRLWALGGSEAELAAFEKEIAAFESE BCMA 9.82LQAYKGKGNPEVEALREDAAMIRDMLQAYRHN 102MGSWIEFDRRLLAIHVRLWALGGSEAELAAFEKEIAAFESE BCMA 13.72LQAYKGKGNPEVEVLRADAAKIRMELQAYRHN 103MGSWIEFDRRLIAIWIRLWALGGSEAELAAFEKEIAAFESE BCMA 9.45LQAYKGKGNPEVESLRSDAADIRQKLQAYRHN 104MGSWVEFDRRLIAIWVRLWALGGSEAELAAFEKEIAAFESE BCMA 5.77LQAYKGKGNPEVEFLRSDAAMIREHLQAYRHN 105MGSWYEFHTRLIAIYVRLWALGGSEAELAAFEKEIAAFESE BCMA 4.06LQAYKGKGNPEVEWLRGDAAKIRGYLQAYRHN 106MGSWSEFSTRLSAIYVRLWALGGSEAELAAFEKEIAAFESE BCMA 5.35LQAYKGKGNPEVEYLRNKAASIRKTLQAYRHN 107MGSWVEFRYRLGAIYHRLWALGGSEAELAAFEKEIAAFESE BCMA 10.81LQAYKGKGNPEVEVLRDRAATIRRLLQAYRHN 108MGSWNEFRNRLGAIDSRLWALGGSEAELAAFEKEIAAFESE BCMA 4.69667LQAYKGKGNPEVETLRAHAAIIRSVLQAYRHN 109MGSWHEFRNRLGAIDSRLWALGGSEAELAAFEKEIAAFESE BCMA 3.49359LQAYKGKGNPEVETLRARAAMIRSVLQAYRHN 110MGSWTEFYQRLEAINFRLWALGGSEAELAAFEKEIAAFESE BCMA 6.955LQAYKGKGNPEVEVLRDKAALIRLMLQAYRHN 111MGSWNEFYNRLHAINLRLWALGGSEAELAAFEKEIAAFESE BCMA 3.00395LQAYKGKGNPEVEVLREHAAIIRQALQAYRHN 112MGSWEEFYGRLSAIQDRLWALGGSEAELAAFEKEIAAFESE BCMA 3.28LQAYKGKGNPEVEWLRMHAAVIRRALQAYRHN 113MGSWGEFNLRLVAIHVRLWALGGSEAELAAFEKEIAAFESE BCMA 12.81LQAYKGKGNPEVEFLRSQAANIRAQLQAYRHN 114MGSWGEFSDRLEAINERLWALGGSEAELAAFEKEIAAFESE BCMA 4.26LQAYKGKGNPEVEELRWQAAFIRANLQAYRHN 115MGSWMEFQGRLPAILARLRALGGSEAELAAFEKEIAAFESE BCMA 8.32LQAYKGKGNPEVEHLRDKAAYIRWMLQAYRHN 116MGSWMEFEGRLPAILARLRALGGSEAELAAFEKEIAAFESE BCMA 3.93LQAYKGKGNPEVEHLRDKAAYIRWMLQAYRHN 117MGSWFEFQNRLQAILFRLRALGGSEAELAAFEKEIAAFESE BCMA 5.39333LQAYKGKGNPEVENLRDKAAYIRLMLQAYRHN 118MGSWVEFDMRLQAILERLRALGGSEAELAAFEKEIAAFESE BCMA 23.525LQAYKGKGNPEVEHLRDSAAYIRLMLQAYRHN 119MGSWVEFNARLDAILFRLRALGGSEAELAAFEKEIAAFESE BCMA 13.52LQAYKGKGNPEVEHLRDQAAYIRLMLQAYRHN 120MGSWMEFNVRLRAILDRLHALGGSEAELAAFEKEIAAFESE BCMA 15.59LQAYKGKGNPEVELLRDKAAYIRFMLQAYRHN 121MGSWIEFDTRLAAIVHRLRALGGSEAELAAFEKEIAAFESE BCMA 13.9475LQAYKGKGNPEVELLRDKAAYIRYMLQAYRHN 122MGSWIEFDYRLKAILHRLRALGGSEAELAAFEKEIAAFESE BCMA 11.8767LQAYKGKGNPEVEGLRDKAAYIRFLLQAYRHN 123MGSWYEFEDRLLAIKVRLRALGGSEAELAAFEKEIAAFESE BCMA 17.6133LQAYKGKGNPEVEYLRDQAAYIRFMLQAYRHN 124MGSWYEFQDRLSAITTRLRALGGSEAELAAFEKEIAAFESE BCMA 10.085LQAYKGKGNPEVELLRDKAAYIRFMLQAYRHN 125MGSWEEFDDRLNAIVYRLRALGGSEAELAAFEKEIAAFESE BCMA 18.64LQAYKGKGNPEVEMLRDQAAYIRLMLQAYRHN 126MGSWVEFEQRLHAIVVRLRALGGSEAELAAFEKEIAAFESE BCMA 17.7467LQAYKGGGNPEVENLRDQAAYIRFMLQAYRHN 127MGSWVEFEWRLEAIVVRLRALGGSEAELAAFEKEIAAFESE BCMA 14.95LQAYKGKGNPEVEHLRDKAAYIRYMLQAYRHN 128MGSWYEFEHRLKAIVSRLGALGGSEAELAAFEKEIAAFESE BCMA 4.55LQAYKGKGNPEVEHLRDKAAYIRYMLQAYRHN 129MGSWMEFKHRLAAITFRLRALGGSEAELAAFEKEIAAFESE BCMA 6.06LQAYKGKGNPEVELLRDKAAYIRLLLQAYRHN 130MGSWMEFEGRLHAIKRRLRALGGSEAELAAFEKEIAAFESE BCMA 7.335LQAYKGKGNPEVEVLRDQAAYIRLLLQAYRHN 131MGSWSEFVFRLDTIKSRLRALGGSEAELAAFEKEIAAFESE BCMA 19.86LQAYKGKGNPEVETLRDQAAYIRLMLQAYRHN 132MGSWYEFDERLSAIKLRLRALGGSEAELAAFEKEIAAFESE BCMA 16.94LQAYKGKGNPEVEVLRAQAAYIRAILQAYRHN 133MGSWMEFDERLWAIKKRLRALGGSEAELAAFEKEIAAFESE BCMA 9.526LQAYKGKGNPEVEFLRHQAAYIRMLLQAYRHN 134MGSWHEFDGRLSAIKRRLWALGGSEAELAAFEKEIAAFESE BCMA 5.4LQAYKGKGNPEVEHLRDQAAYIRYMLQAYRHN 135MGSWYEFDGRLQAIIARLRALGGSEAELAAFEKEIAAFESE BCMA 3.29LQAYKGKGNPEVEHLRFRAAYIRWILQAYRHN 136MGSWFEFDKRLYAIIHRLRALGGSEAELAAFEKEIAAFESE BCMA 11.82LQAYKGKGNPEVEKLRYKAAIIRLYLQAYRHN 137MGSWVEFDNRLYAIVDRLRALGGSEAELAAFEKEIAAFESE BCMA 11.7167LQAYKGKGNPEVEHLRQKAAYIRLILQAYRHN 138MGSWIEFHQRLNAIFNRLRALGGSEAELAAFEKEIAAFESE BCMA 7.34167LQAYKGKGNPEVEWLRHHAAYIREMLQAYRHN 139MGSWNEFRLRLWAITERLRALGGSEAELAAFEKEIAAFESE BCMA 3.87179LQAYKGKGNPEVECLRAEAAWIRTMLQAYRHN 140MGSWYEFWLRLSAISYRLQALGGSEAELAAFEKEIAAFESE BCMA 14.4653LQAYKGKGNPEVEWLRKEAAEIRSWLQAYRHN 141MGSWYEFQLRLWAIHWRLIALGGSEAELAAFEKEIAAFESE BCMA 20.59LQAYKGKGNPEVEWLRMRAAEIRNELQAYRHN 142MGSWYEFAHRLEAIEWRLIALGGSEAELAAFEKEIAAFESE BCMA 9.48LQAYKGKGNPEVEELRQYAAAIRNYLQAYRHN 143MGSWYEFDTRLGAIRNRLGALGGSEAELAAFEKEIAAFESE BCMA 13.934LQAYKGKGNPEVEWLRFQAAYIRFLLQAYRHN 144MGSWYEFWVRLTAIRWRLEALGGSEAELAAFEKEIAAFESE BCMA 5.72LQAYKGKGNPEVEWLREQAASIRWVLQAYRHN 145MGSWFEFDRRLKAIDRRLMALGGSEAELAAFEKEIAAFESE BCMA 6.1625LQAYKGKGNPEVEWLRMQAAIIRNYLQAYRHN 146MGSWVEFWERLDAIDNRLGALGGSEAELAAFEKEIAAFESE BCMA 11.42LQAYKGKGNPEVEWLRWHAAYIRGYLQAYRHN 147MGSWAEFWDRLDAIDSRLNALGGSEAELAAFEKEIAAFESE BCMA 18.22LQAYKGKGNPEVEYLREWAAYIRGYLQAYRHN 148MGSWAEFDLRLRAIAKRLVALGGSEAELAAFEKEIAAFESE BCMA 4.09LQAYKGKGNPEVEMLRLDAAYIRGVLQAYRHN 149MGSWSEFWDRLYAIRIRLDALGGSEAELAAFEKEIAAFESE BCMA 12.52LQAYKGKGNPEVEKLRSVAARIRNWLQAYRHN 150MGSWSEFWFRLGAIRNRLDALGGSEAELAAFEKEIAAFESE BCMA 14.93LQAYKGKGNPEVEKLRDVAAHIRHWLQAYRHN 151MGSWSEFNDRLDAIRWRLDALGGSEAELAAFEKEIAAFESE BCMA 13.59LQAYKGKGNPEVEWLRQVAATIRYRLQAYRHN 152MGSWVEFWDRLGAIRERLQALGGSEAELAAFEKEIAAFESE BCMA 5.22LQAYKGKGNPEVEKLRYTAAAIRHYLQAYRHN 153MGSWAEFWDRLGAIRERLQALGGSEAELAAFEKEIAAFESE BCMALQAYKGKGNPEVEKLRYTAAAIRHYLQAYRHN 154MGSWTEFWDRLGAIRERLQALGGSEAELAAFEKEIAAFESE BCMALQAYKGKGNPEVEKLRYTAAAIRHYLQAYRHN 155MGSWVEFWDRLGAIRERLQALGGSEAELAAFEKEIAAFESE BCMALQAYKGKGNPEVEKLKYTAAAIRHYLQAYRHN 156MGSWVEFWDRLGAIRERLQALGGSEAELAAFEKEIAAFESE BCMALQAYKGKGNPEVEKLQYTAAAIRHYLQAYRHN 157MGSWVEFWDRLGAIRERLQALGGSEAELAAFEKEIAAFESE BCMALQAYKGKGNPEVEKLRYTAAAIKHYLQAYRHN 158MGSWAEFWDRLGAIRERLQALGGSEAELAAFEKEIAAFESE BCMALQAYKGKGNPEVEKLQYTAAAIKHYLQAYRHN 159MGSWTEFWDRLGAIRERLQALGGSEAELAAFEKEIAAFESE BCMALQAYKGKGNPEVEKLQYTAAAIKHYLQAYRHN 160MGSWVEFWDRLGAIRERLEALGGSEAELAAFEKEIAAFESE BCMA 4.18LQAYKGKGNPEVEKLRYVAAVIRHRLQAYRHN 161MGSWVEFWDRLGAIRERLQALGGSEAELAAFEKEIAAFESE BCMA 3.07LQAYKGKGNPEVEELRASAAAIRIALQAYRHN 162MGSWVEFWDRLGAIRDRLDALGGSEAELAAFEKEIAAFESE BCMA 16.034LQAYKGKGNPEVEELRNTAAYIRTFLQAYRHN 163MGSWSEFWVRLGAIRDRLDALGGSEAELAAFEKEIAAFESE BCMA 23.5LQAYKGKGNPEVEALRVTAAQIRHYLQAYRHN 164MGSWSEFWVRLGAIRERLDALGGSEAELAAFEKEIAAFESE BCMA 7.55667LQAYKGKGNPEVEKLRYTAATIRRFLQAYRHN 165MGSWSEFWARLGAIRERLDALGGSEAELAAFEKEIAAFESE BCMALQAYKGKGNPEVEKLRYTAATIRRFLQAYRHN 166MGSWSEFWVRLGAIRERLDALGGSEAELAAFEKEIAAFESE BCMALQAYKGKGNPEVEKLRYTAGTIRRFLQAYRHN 167MGSWSEFWVRLGAIRERLDALGGSEAELAAFEKEIAAFESE BCMALQAYKGKGNPEVEKLRYTAATIKRFLQAYRHN 168MGSWSEFWARLGAIRERLDALGGSEAELAAFEKEIAAFESE BCMALQAYKGKGNPEVEKLRYTAGTIKRFLQAYRHN 169MGSWSEFWDRLTAIRVRLDALGGSEAELAAFEKEIAAFESE BCMA 16.14LQAYKGKGNPEVEKLRYTAAHIRKFLQAYRHN 170MGSWTEFWTRLNAIYERLDALGGSEAELAAFEKEIAAFESE BCMA 8.43LQAYKGKGNPEVEKLRFTAASIRMYLQAYRHN 171MGSWFEFWDRLAAIRDRLEALGGSEAELAAFEKEIAAFESE BCMA 12.78LQAYKGKGNPEVEDLRYVAAKIRVRLQAYRHN 172MGSWTEFWVRLNAIRDRLEALGGSEAELAAFEKEIAAFESE BCMA 12.53LQAYKGKGNPEVEDLRHTAAIIRNYLQAYRHN 173MGSWVEFWHRLGAIYDRLEALGGSEAELAAFEKEIAAFESE BCMA 19.904LQAYKGKGNPEVEELRRTAALIRQTLQAYRHN 174MGSWVEFWNRLGAIYDRLEALGGSEAELAAFEKEIAAFESE BCMA 14.55LQAYKGKGNPEVEKLRHTAAVIRLYLQAYRHN 175MGSWSEFWERLEAIYDRLYALGGSEAELAAFEKEIAAFESE BCMA 18.78LQAYKGKGNPEVEELRRTAATIRSFLQAYRHN 176MGSWEEFDNRLEAIFDRLEALGGSEAELAAFEKEIAAFESE BCMA 3.93LQAYKGKGNPEVEELREFAATIRITLQAYRHN 177MGSWMEFWDRLYAIEFRLFALGGSEAELAAFEKEIAAFESE BCMA 11.6925LQAYKGKGNPEVEKLRRVAATIRNELQAYRHN 178MGSWTEFWERLYAIEYRLFALGGSEAELAAFEKEIAAFESE BCMA 12.7LQAYKGKGNPEVEKLRSVAATIRYELQAYRHN 179MGSWNEFWERLYAIELRLFALGGSEAELAAFEKEIAAFESE BCMA 9.945LQAYKGKGNPEVEKLRMTAAYIRNELQAYRHN 180MGSWYEFWKRLYAIEYRLFALGGSEAELAAFEKEIAAFESE BCMA 14.785LQAYKGKGNPEVEALRKVAAKIREQLQAYRHN 181MGSWTEFWARLYAIEMRLFALGGSEAELAAFEKEIAAFESE BCMA 12.46LQAYKGKGNPEVEHLRRVAALIREQLQAYRHN 182MGSWHEFWDRLYAIEFRLFALGGSEAELAAFEKEIAAFESE BCMA 7.3LQAYKGKGNPEVESLRQVAAKIRWHLQAYRHN 183MGSWDEFEFRLGALRWRLIALGGSEAELAAFEKEIAAFESE BCMA 9.2LQAYKGKGNPEVEYLRFGAAHIRHILQAYRHN 184MGSWTEFYHRLYAIRERLSALGGSEAELAAFEKEIAAFESE BCMA 9.6275LQAYKGKGNPEVEYLRFGAAHIRHLLQAYRHN 185MGSWVEFETRLDAIRMRLGALGGSEAELAAFEKEIAAFESE BCMA 14.0717LQAYKGKGNPEVEYLRFGAAHIRALLQAYRHN 186MGSWGEFDVRLFAIRERLSALGGSEAELAAFEKEIAAFESE BCMA 7.35333LQAYKGKGNPEVEYLRGYAAQIRSFLQAYRHN 187MGSWVEFDERLSAIRERLDALGGSEAELAAFEKEIAAFESE BCMA 5.61LQAYKGKGNPEVEYLRLYAAQIRVFLQAYRHN 188MGSWSEFDGRLGAIWDRLYALGGSEAELAAFEKEIAAFESE BCMA 10.0305LQAYKGKGNPEVEYLRDRAAQIREFLQAYRHN 189MGSWGEFEGRLHAIRSRLSALGGSEAELAAFEKEIAAFESE BCMA 6.17LQAYKGKGNPEVEVLRGYAAWIRALLQAYRHN 190MGSWGEFNGRLGAIRERLQALGGSEAELAAFEKEIAAFESE BCMA 4.95333LQAYKGKGNPEVEFLRAYAASIRAVLQAYRHN 191MGSWWEFTFRLAAIEFRLEALGGSEAELAAFEKEIAAFESE BCMA 5.75LQAYKGKGNPEVEDLRAIAAEIRKSLQAYRHN 192MGSWDEFQFRLAAIGFRLGALGGSEAELAAFEKEIAAFESE BCMA 6.155LQAYKGKGNPEVEVLRRQAARIRHLLQAYRHN 193MGSWYEFVTRLHAIDHRLKALGGSEADLAAFEKEIAAFESE BCMA 4.12LQAYKGKGNPEVEWLRFYAAGIRMNLQAYRHN 194MGSWSIEFWRLEAIKFRLIALGGSEAELAAFEKEIAAFESE BCMA 8.43LQAYKGKGNPEVEFLRVEAAAIRRVLQAYRHN 195MGSWGEFEHRLDPSTCVWLALGGSEAELAAFEKEIAAFESE BCMA 4.05LQAYKGKGNPEVEKLRRGAAVIRHWLQAYRHN 196MGSWIEFAMRLEAIENRLTALGGSEAELAIFESMIAHFEEL BCMA 10.73LQNYKGKGNPEVEALIHEAFAIHKELWAYRHN 197MGSWNEFYQRLEAIENRLQALGGSEAELAMFEVRIALFEDM BCMA 6.01LQGYKGKGNPEVEALKQEAIAILRELIAYRHN 198MGSWNEFYDRLRAIKKRLYALGGSEAELADFEEDIAQFEVD BCMA 12.36LQDYKGKGNPEVEALHREAHAITHELWAYRHN 199MGSWGEFKHRLALIKWYLEALGGSEAELAHFEDWIAVFEVQ BCMA 17.09LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 200MGSWYEFKHRLAIIKWYLEALGGSEAELAKFEAWIAEFEMI BCMA 5.505LQRYKGKGNPEVEALRKEAAAIRDELQAYRHN 201MGSWYEFKHRLAIIKWYLEALGGSEAELAHFEQYIADFEGT BCMA 14.8333LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 202MGSWYNFKHRLAIIKWYLEALGGSEAELARFENFIANFETQ BCMA 6.7615LQLYKGKGNPEVEALRKEAAAIRDELQAYRHN 203MGSWFQFKHRLAIIKWQLEALGGSEAELAWFEQWIADFEHQ BCMA 10.39LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 204MGSWYNFKHRLAIIKWFLEALGGSEAELAVFEVWIADFEHQ BCMA 16.38LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 205MGSWDAFKHRLALIKWYLEALGGSEAELAHFEEYIAEFESN BCMA 12.98LQSYKGKGNPEVEALRKEAAAIRDELQAYRHN 206MGSWDGFKHRLALIKWYLEALGGSEAELANFENWIAEFEQR BCMA 23.62LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 207MGSWNGFKHRLAIIKWYLEALGGSEAELASFESYIAEFESG BCMA 16.53LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 208MGSWNSFKHRLALIKWYLEALGGSEAELATFEWYIASFESE BCMA 10.34LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 209MGSWSDFKYRLAVIKFYLEALGGSEAELASFESFIAHFEDD BCMA 13.04LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 210MGSWSGFKYRLAVIKFYLEALGGSEAELASFELFIAKFEID BCMA 13.066LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 211MGSWYGFKYRLAVIKWYLEALGGSEAELASFEKYIAHFEHD BCMA 9.05LQAYKGKGNPEVEALRKEAAAIRDELQAYRHN 212MGSWYGFKYRLAVIKWYLEALGGSEAELASFEKYIAQFEHD BCMA 7.63333LQAYKGKGNPEVEALRKEAAAIRDELQAYRHN 213MGSWYGFKYRLALIKWYLEALGGSEAELASFETYIADFEDL BCMA 13.03LQAYKGKGNPEVEALRKEAAAIRDELQAYRHN 214MGSWSTFKYHLAVIKWYLEALGGSEAELASFEDYIAQFETD BCMA 11.65LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 215MGSWHEFKYRLALIKWYLEALGGSEAELATFEHHIAQFEWD BCMA 16.19LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 216MGSWNMFKYRLAHIKWYLEALGGSEAELATFEAYIADFEVD BCMA 16.33LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 217MGSWHGFKYRLAIIKWWLEALGGSEAELAFFEEWIASFERD BCMA 6.025LQIYKGKGNPEVEALRKEAAAIRDELQAYRHN 218MGSWHGFKYRLAVIKWYLEALGGSEAELAMFEGWIAQFEIT BCMA 5.99LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 219MGSWQGFKYRLAVIKWMLEALGGSEAELAFFENWIAEFETK BCMA 7.75LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 220MGSWSGFKYRLAVIKWYLEALGGSEAELATFEEWIAEFETE BCMA 13.975LQFYKGKGNPEVEALRKEAAAIRDELQAYRHN 221MGSWGYFKYRLAMIKWYLEALGGSEAELASFESWIAEFEGS BCMA 13.018LQAYKGKGNPEVEALRKEAAAIRDELQAYRHN 222MGSWHAFKYKLAMIKWYLEALGGSEAELAHFEEWIAEFEAL BCMA 11.63LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 223MGSWQHFKYRLAIIKWYLEALGGSEAELAFFESFIAKFEHD BCMA 8.91LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 224MGSWNDFKYRLAIIKYYLEALGGSEAELAHFESYIASFEHD BCMA 15.1233LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 225MGSWGAFKYRLAIIKFYLEALGGSEAELARFEEFIANFEHD BCMA 12.88LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 226MGSWYNFKYRLAIIKFYLEALGGSEAELAQFEIWIAEFEHD BCMA 19.91LQGYKGKGNPEVEALRKEAAAIRDELQAYRHN 227MGSWEQFKYRLAIIKYMLEALGGSEAELAWFESWIANFESD BCMA 11.01LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 228MGSWQQFKYRLAIIKYYLEALGGSEAELAGFETYIAKFEEV BCMA 15.12LQSYKGKGNPEVEALRKEAAAIRDELQAYRHN 229MGSWAGFKYRLAVIKYYLEALGGSEAELAHFEQWIAHFEGM BCMA 12.68LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 230MGSWTAFKYRLAIIKFYLEALGGSEAELAHFESYIAHFEDM BCMA 7.43LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 231MGSWAHFKYRLAIIKFWLEALGGSEAELANFEEYIAEFEST BCMA 13.12LQVYKGKGNPEVEALRKEAAAIRDELQAYRHN 232MGSWANFKYRLALIKWHLEALGGSEAELASFEIWIADFEES BCMA 14.2878LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 233MGSWATFKYRLALIKWHLEALGGSEAELADFEEYIAGFEEG BCMA 15.07LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 234MGSWTHFKYRLALIKWWLEALGGSEAELAGFEVHIADFEAQ BCMA 7.36692LQMYKGKGNPEVEALRKEAAAIRDELQAYRHN 235MGSWNTFKYHLAVIKFMLEALGGSEAELAFFEQWIAEFEVT BCMA 10.6006LQSYKGKGNPEVEALRKEAAAIRDELQAYRHN 236MGSWTQFKYHLAVIKWYLEALGGSEAELAGFEQWIAEFEKT BCMA 21.1178LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 237MGSWNQFKYRLAVIKFYLEALGGSEAELAHFETWIAAFEEQ BCMA 12.85LQFYKGKGNPEVEALRKEAAAIRDELQAYRHN 238MGSWNEFKYHLAVIKFYLEALGGSEAELAHFETWIAEFEYE BCMA 13.68LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 239MGSWVQFKYHLAVIKFYLEALGGSEAELAHFETWIAEFEVA BCMA 12.6957LQGYKGKGNPEVEALRKEAAAIRDELQAYRHN 240MGSWVDFKYHLAVIKFWLEALGGSEAELANFETWIANFEQE BCMA 13.22LQMYKGKGNPEVEALRKEAAAIRDELQAYRHN 241MGSWVDFKYHLAVIKWYLEALGGSEAELADFENWIAHFESI BCMA 10.43LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 242MGSWVEFKYHLAVIKFTLEALGGSEAELADFEEEIARFEMI BCMA 6.92LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 243MGSWSHFKYHLALIKWYLEALGGSEAELAKFEFWIAEFEHN BCMA 7.93LQMYKGKGNPEVEALRKEAAAIRDELQAYRHN 244MGSWYHFKYHLALIKWYLEALGGSEAELAHFEHWIAEFEWT BCMA 8.85LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 245MGSWQGFKYHLALIKFYLEALGGSEAELAHFEHWLAEFEHD BCMA 21.2LQTYKGKGNPEVEALRKEAAAIRDELQAYRHN 246MGSWLSFKHHLALIKWYLEALGGSEAELASFEAWIALFEHQ BCMA 6.305LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 247MGSWSEFKYKLALIKWYLEALGGSEAELAHFEGWIANFETT BCMA 11.2875LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 248MGSWIEFKYKLAIIKFYLEALGGSEAELAHFEHWIADFEFV BCMA 14.88LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 249MGSWQNFKYHLAMIKWYLEALGGSEAELANFEEFIAQFEIN BCMA 9.55LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 250MGSWYNFKYHLAIIKWWLEALGGSEAELADFEHYIADFERN BCMA 8.62636LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 251MGSWYQFKYHLAIIKWYLEALGGSEAELAGFENYIATFEQE BCMA 18.41LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 252MGSWSHFKYHLAIIKFYLEALGGSEAELAGFEIWIAKFEDE BCMA 9.34LQMYKGKGNPEVEALRKEAAAIRDELQAYRHN 253MGSWVGFKAHLAIIKWYLEALGGSEAELAGFEIFIADFEAL BCMA 9.71LQMYKGKGNPEVEALRKEAAAIRDELQAYRHN 254MGSWVNFKYKLAIIKYMLEALGGSEAELAFFEDWIAEFERT BCMA 7.38951LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 255MGSWSNFKYRLAVIKYMLEALGGSEAELAFFEDWIADFELH BCMA 9.34LQVYKGKGNPEVEALRKEAAAIRDELQAYRHN 256MGSWTNFKYKLAVIKFMLEALGGSEAELAFFEDWIAGFEID BCMA 11.4075LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 257MGSWTGFKYRLAIIKFMLEALGGSEAELAFFEQWIADFENE BCMA 13.89LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 258MGSWHNFKYRLAIIKFMLEALGGSEAELAWFENWIADFEDS BCMA 13.59LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 259MGSWFAFKHRLAVIKYMLEALGGSEAELAFFEHWIAQFEHD BCMA 11.985LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 260MGSWYEFKHRLAVIKYMLEALGGSEAELAFFENWIAQFEHE BCMA 3.71LQTYKGKGNPEVEALRKEAAAIRDELQAYRHN 261MGSWYKFKHKLAVIKYMLEALGGSEAELAWFEEWIAEFEVT BCMA 4.54LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 262MGSWFYFKQKLAFIKWYLEALGGSEAELANFEIYIAEFEVM BCMA 7.23LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 263MGSWFSFKHHLAVIKWNLEALGGSEAELASFEEQIAEFESV BCMA 6.45LQAYKGKGNPEVEALRKEAAAIRDELQAYRHN 264MGSWGNFKYRLAIIKFHLEALGSSEAELATFEAWIANFESM BCMA 22.7LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 265MGSWSYFKYGLAIIKIRLEALGGSEAELADFERWIAAFEHD BCMA 13.33LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 266MGSWSYFKFGLAHIKLRLEALGGSEAELADFEQWIASFEEQ BCMA 18.354LQTYKGKGNPEVEALRKEAAAIRDELQAYRHN 267MGSWSYFKWGLAHIKLRLEALGGSEAELADFEFWIAEFEGL BCMA 17.64LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 268MGSWIYFKYGLAHIKTRLEALGGSEAELADFEQWIAEFEKM BCMA 21.12LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 269MGSWGYFKYGLATIKHRLEALGGSEAELADFELWIAKFEEQ BCMA 14.01LQVYKGKGNPEVEALRKEAAAIRDELQAYRHN 270MGSWEYFKYGLATIKMHLEALGGSEAELADFEHWIAHFEHQ BCMA 18.4033LQMYKGKGNPEVEALRKEAAAIRDELQAYRHN 271MGSWSYFKYGLATIKEKLEALGGSEAELADFETWIAMFEKQ BCMA 18.15LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 272MGSWHYFKNGLAIIKEKLEALGGSEAELADFEIWIAMFEME BCMA 19.85LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 273MGSWQYFKYGLAIIKIKLEALGGSEAELADFEAWIATFEKQ BCMA 10.28LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 274MGSWVYFKHGLAVIKMRLEALGGSEAELADFETWIAQFEMT BCMA 21.45LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 275MGSWVYFKYGLAVIKEKLEALGGSEAELADFETWIAEFEFG BCMA 17.58LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 276MGSWYYFKYGLAVIKGKLEALGGSEAELADFETWIAKFENH BCMA 3.84LQSYKGKGNPEVEALRKEAAAIRDELQAYRHN 277MGSWTYFKYGLALIKYRLEALGGSEAELADFEEWIAQFEVS BCMA 15.21LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 278MGSWDYFKYGLALIKIKLEALGGSEAELADFEVWIAQFEMA BCMA 15.76LQVYKGKGNPEVEALRKEAAAIRDELQAYRHN 279MGSWTYFKFGLAHIKDSLEALGGSEAELADFEQWIAMFEQD BCMA 17.01LQVYKGKGNPEVEALRKEAAAIRDELQAYRHN 280MGSWGYFKHGLAHIKSSLEALGGSEAELADFEVWIAAFENE BCMA 18.505LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 281MGSWGYFKTGLAIIKAQLEALGGSEAELADFELWIAQFEET BCMA 12.75LQFYKGKGNPEVEALRKEAAAIRDELQAYRHN 282MGSWAYFKYGLAVIKLHLEALGGSEAELADFERYIAEFEYE BCMA 13.44LQAYKGKGNPEVEALRKEAAAIRDELQAYRHN 283MGSWLDFKEGLADIKRSLEALGGSEAELADFEGVIALFEWK BCMA 3.03LQTYKGKGNPEVEALRKEAAAIRDELQAYRHN 284MGSWEVFKHELAVIKDYLEALGGSEAELAHFEWGIAWFEGF BCMA 9.33LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 285MGSWIVFKQSLAWIKEHLEALGGSEAELAEFEFYIANFEHT BCMA 10.57LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 286MGSWIYFKDSLAYIKKYLEALGGSEAELATFEYYIANFEHE BCMA 3.2LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 287MGSWDHFKYNLAWIKKYLEALGGSEAELATFEWYIANFEKR BCMA 9.81LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 288MGSWFTFKQNLAWIKLHLEALGGSEAELARFEYYIADFENK BCMA 14.204LQLYKGKGNPEVEALRKEAAAIRDELQAYRHN 289MGSWREFKYGLAHIKRVLEALGGSEAELAVFEYYIAKFEQE BCMA 14.7LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 290MGSWIQFKYGLAHIKRTLEALGGSEAELAVFEWYIADFEQQ BCMA 8.35667LQGYKGKGNPEVEALRKEAAAIRDELQAYRHN 291MGSWVEFKHNLAWIKVTLEALGGSEAELAVFEYYIAQFEEQ BCMA 15.83LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 292MGSWISFKDNLAMIKEFLEALGGSEAELAVFEWYIATFEVE BCMA 7.16LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 293MGSWHIFKDNLATIKAFLEALGGSEAELAVFEWYIAKFEEE BCMA 3.47LQGYKGKGNPEVEALRKEAAAIRDELQAYRHN 294MGSWTSFKHGLAGIKRVLEALGGSEAELATFEWYIAQFERH BCMA 9.765LQAYKGKGNPEVEALRKEAAAIRDELQAYRHN 295MGSWQSFKHALADIKINLEALGGSEAELAQFEYAIAVFEYR BCMA 13.7188LQAYKGKGNPEVEALRKEAAAIRDELQAYRHN 296MGSWHTFKEALAQIKGELEALGGSEAELASFEYAIAVFEYR BCMA 6.76LQMYKGKGNPEVEALRKEAAAIRDELQAYRHN 297MGSWTDFKTSLADIKAELEALGGSEAELAKFEYYIAIFEYR BCMA 18.76LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 298MGSWTNFKEGLAEIKRDLEALGGSEAELARFEYVIAVFEFR BCMA 12.3267LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 299MGSWHTFKDGLAEIKSELEALGGSEAELAMFEYVIAIFEYR BCMA 10.65LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 300MGSWQFFKEHLASIKFWLEALGGSEAELAFFEDAIADFEYH BCMA 10.58LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 301MGSWTYFKEHLASIKFWLEALGGSEAELAFFEDAIAEFEKD BCMA 6.59507LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 302MGSWIIFKGYLAHIKHHLEALGGSEAELADFEFYIAIFEME BCMA 5.18LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 303MGSWYLFQSHLAHIKHHLEALGGSEAELAWFEFTIAGFEQE BCMA 7.69LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 304MGSWYSFKWTLARIKLELEALGGSEAELAYFENVIAHFEME BCMA 4.05LQSYKGKGNPEVEALRKEAAAIRDELQAYRHN 305MGSWTTLKWRLAHIKQHLEALGGSEAELALFEYDIAHFEEL BCMA 17.82LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 306MGSWYGFKWYLATIKKHLEALGGSEAELALFETEIATFELW BCMA 10.65LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 307MGSWIEFNMRVLAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 3.2LQAYKGKGNPEVESLRYEACLDPWSSAAYRHN 308MGSWIEFHERLWAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 3.4LQAYKGKGNPEVESLREMAASIRHGLQAYRHN 309MGSWFEFYERLWAIDDRLWALGGSEAELAAFEKEIAAFESE CD123 6LQAYKGKGNPEVEWLREEAASIRSSLQAYRHN 310MGSWFEFWDRLEAIDDRLFALGGSEAELAAFEKEIAAFESE CD123 4.9LQAYKGKGNPEVESLRYNAAEIRKELQAYRHN 311MGSWHEFWSRLDAIDDRLFALGGSEAELAAFEKEIAAFESE CD123 3.8LQAYKGKGNPEVEYLRGAAADIRAELQAYRHN 312MGSWYEFWIRLEAIDDRLFALGGSEAELAAFEKEIAAFESE CD123 10.4LQAYKGKGNPEVDILRDFAADIRTELQAYRHN 313MGSWHEFWDRLEAIDDRLYALGGSEAELAAFEKEIAAFESE CD123 10.6LQAYKGKGNPEVEFLREEAAYIRELLQAYRHN 314MGSWEEFWDRLFAIDDRLWALGGSEAELAAFEKEIAAFESE CD123 3.1LQAYKGKGNPEVETLRNEAAEIRMALQAYRHN 315MGSWWEFDDRLFAIDTRLMALGGSEAELAAFEKEIAAFESE CD123 3.5LQAYKGKGNPEVESLREWAATIRMELQAYRHN 316MGSWTEFHDRLEAIDDRLWALGGSEAELAAFEKEIAAFESE CD123 5.8LQAYKGKGNPEVEYLREEAAQIRWELQAYRHN 317MGSWAEFEDRLWAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 6.2LQAYKGKGNPEVEYLREEAAAIRFELQAYRHN 318MGSWVEFWFRLEAIDSRLWALGGSEAELAAFEKEIAAFESE CD123 3.2LQAYKGKGNPEVEWLREEAAAIREDLQAYRHN 319MGSWVEFWQRLEAIESRLWALGGSEAELAAFEKEIAAFESE CD123 7.7LQAYKGKGNPEVEFLREEAAEIRWELQAYRHN 320MGSWSEFWQRLEAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 4.7LQAYKGKGNPEVEWLRENAAMIRDELQAYRHN 321MGSWSEFITRLEAIDDRLWALGGSEAELAAFEKEIAAFESE CD123 3.3LQAYKGKGNPEVEILREEAAEIRQHLQAYRHN 322MGSWYEFETRLEAIYDRLWALGGSEAELAAFEKEIAAFESE CD123 3.2LQAYKGKGNPEVELLRVEAAEIREDLQAYRHN 323MGSWTEFYYRLEAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 7.5LQAYKGKGNPEVEFLRVEAANIRDMLQAYRHN 324MGSWYEFVIRLEAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 6.4LQAYKGKGNPEVEVLRWYAADIRHELQAYRHN 325MGSWTEFSIRLEAIYDRLVALGGSEAELAAFEKEIAAFESE CD123 11.9LQAYKGKGNPEVEVLRTYAANIRHELQAYRHN 326MGSWTEFSIRLEAIYDRLVALGGSEAELAAFEKEIAAFESE CD123 10.2LQAYKGKGNPEVEVLRTYAAFIRHELQAYRHN 327MGSWTEFVWRLEAIWDRLDALGGSEAELAAFEKEIAAFESE CD123 3.6LQAYKGKGNPEVEVLREDAAVIRHFLQAYRHN 328MGSWVEFHERLEAIEDRLMALGGSEAELAAFEKEIAAFESE CD123 3.7LQAYKGKGNPEVEYLREDAAFIRQLLQAYRHN 329MGSWVEFHDRLEAIEDRLYALGGSEAELAAFEKEIAAFESE CD123 4.6LQAYKGKGNPEVEWLREDAAYIRSILQAYRHN 330MGSWIEFYDRLEAIYDRLDALGGSEAELAAFEKEIAAFESE CD123 7.5LQAYKGKGNPEVEWLREDAAFIRSWLQAYRHN 331MGSWVEFDQRLEAIYDRLYALGGSEAELAAFEKEIAAFESE CD123 5.1LQAYKGKGNPEVEWLREDAAQIRKWLQAYRHN 332MGSWVEFHDRLEAIEDRLLALGGSEAELAAFEKEIAAFESE CD123 3.3LQAYKGKGNPEVEDLREYAAGIRWFLQAYRHN 333MGSWEEFAQRLYAIEWRLYALGGSEAELAAFEKEIAAFESE CD123 16.9LQAYKGKGNPEVEVLRYVAAQIRYHLQAYRHN 334MGSWDEFAWRLDVIFARLGALGGSEAELAAFEKEIAAFESE CD123 4.6LQAYKGKGNPEVEELRKNAAQIRDGLQAYRHN 335MGSWDEFYYRLEAIEMRLGALGGSEAELAAFEKEIAAFESE CD123 7.2LQAYKGKGNPEVEELRHYAAQIRHMLQAYRHN 336MGSWEEFYDRLEAIYNRLGALGGSEAELAAFEKEIAAFESE CD123 18.6LQAYKGKGNPEVEVLREYAADIREMLQAYRHN 337MGSWDEFGRRLYAIEWQLYALGGEEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEALRKEAAVIRENLQAYRHN 338MGSWDEFGRRLYAIEWQLYALGGTEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEALRKEAAVIRENLQAYRHN 339MGSWDEFGRRLYAIETQLYALGGEEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREIAAVIRENLQAYRHN 340MGSWDEFGRRLYAIEWQLYALGGEEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREIAAVIRENLQAYRHN 341MGSWDEFGRRLYAIKWQLYALGGEEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREIAAVIRENLQAYRHN 342MGSWDEFGRRLYAIEWQLYALGGEEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLRKIAAVIRENLQAYRHN 343MGSWDEFGRRLYAIEWQLYALGGGEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREIAAVIRENLQAYRHN 344MGSWDEFGRRLYAIEWQLYALGGTEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREIAAVIRENLQAYRHN 345MGSWDEFGRRLYAIEWQLYALGGGEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREIAAVIRSNLQAYRHN 346MGSWDEFGRRLYAIEWQLYALGGTEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREIAAVIRSNLQAYRHN 347MGSWDEFGRRLYAIEWQLYALGGEEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREIAAVIRSNLQAYRHN 348MGSWDEFGRRLAAIEWQLYALGGEEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREIAAVIRENLQAYRHN 349MGSWDEFGRRLYAIEWQLYALGGEEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEALREIAAVIRENLQAYRHN 350MGSWDEFGRRLYAIEWQLYALGGEEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREEAAVIRENLQAYRHN 351MGSWDEFGRRLYAIEWRLYALGGSEAELAAFEKEIAAFESE CD123LQAYKGKGSPEVEKLREIAAVIRSNLQAYRHN 352MGSWDEFGRRLYAIEWRLYALGGSEAELAAFEKEIAAFESE CD123 5.8LQAYKGKGNPEVEKLREIAAVIRSNLQAYRHN 353MGSWDEFGRRLYAIEWRLYALGGEEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREIAAVIRSNLQAYRHN 354MGSWDEFGRRLYAIEWQLYALGGSEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREIAAVIRSNLQAYRHN 355MGSWDEFSRRLYAIEWRLYALGGSEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREIAAVIRSNLQAYRHN 356MGSWDEFGRRLYAIEWRLYALGGSEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREIAAVIRENLQAYRHN 357MGSWDEFGRRLAAIKTQLAALGGEEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREIAAVIRENLQAYRHN 358MGSWDEFGRRLAAIKTQLAALGGTEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEKLREIAAVIRENLQAYRHN 359MGSWDEFGRRLAAIKTQLAALGGEEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEALRKEAAVIRENLQAYRHN 360MGSWDEFGRRLAAIKTQLAALGGTEAELAAFEKEIAAFESE CD123LQAYKGKGNPEVEALRKEAAVIRENLQAYRHN 361MGSWDEFEQRLIAIEERLFALGGSEAELAAFEKEIAAFESE CD123 5.9LQAYKGKGNPEVEWLREEAAVIRKYLQAYRHN 362MGSWVEFDQRLGAIWDRLVALGGSEAELAAFEKEIAAFESE CD123 5.3LQAYKGKGNPEVEHLRQGAAVIRDDLQAYRHN 363MGSWVEFDMRLSAIWERLIALGGSEAELAAFEKEIAAFESE CD123 3.3LQAYKGKGNPEVEWLREDAAEIREFLQAYRHN 364MGSWVEFDQRLDAIYERLYALGGSEAELAAFEKEIAAFESE CD123 10.5LQAYKGKGNPEVEWLRDEAAEIREHLQAYRHN 365MGSWHEFDQRLWAIEERLWALGGSEAELAAFEKEIAAFESE CD123 3.3LQAYKGKGNPEVETLRLYAALIRHDLQAYRHN 366MGSWVEFWDRLDAIEGRLWALGGSEAELAAFEKEIAAFESE CD123 3.5LQAYKGKGNPEVEDLRWLAAEIRADLQAYRHN 367MGSWVEFYSRLDAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 9.4LQAYKGKGNPEVEWLRIAAASIREDLQAYRHN 368MGSWYEFYERLDAIEERLWALGGSEAELAAFEKEIAAFESE CD123 8.4LQAYKGKGNPEVEVLRDWAAWIREDLQAYRHN 369MGSWFEFDDRLWAIENRLWALGGSEAELAAFEKEIAAFESE CD123 4.2LQAYKGKGNPEVEVLRDNAAWIREILQAYRHN 370MGSWYEFWDRLDALEDRLWALGGSEAELAAFEKEIAAFESE CD123 9.7LQAYKGKGNPEVEYLRDSAAFIREELQAYRHN 371MGSWMEFVDRLDAIESRLWALGGSEAELAAFEKEIAAFESE CD123 5.8LQAYKGKGNPEVEWLRIEAAFIREELQAYRHN 372MGSWDEFVDRLWAIEERLWALGGSEAELAAFEKEIAAFESE CD123 6LQAYKGKGNPEVEELRIQAAIIREALQAYRHN 373MGSWFEFNYRLGAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 6.9LQAYKGKGNPEVEMLRQIAAEIREFLQAYRHN 374MGSWEEFFTRLDAINERLEALGGSEAELAAFEKEIAAFESE CD123 3.9LQAYKGKGNPEVEMLRYEAAEIRHMLQAYRHN 375MGSWYEFSNRLDAIGERLWALGGSEAELAAFEKEIAAFESE CD123 3.9LQAYKGKGNPEVEILRHQAAEIRWFLQAYRHN 376MGSWYEFWGRLDAIEERLWALGGSEAELAAFEKEIAAFESE CD123 5.4LQAYKGRGNPEVEMLREDAAEIRGQLQAYRHN 377MGSWVEFWDRLWAIDYRLFALGGSEAELAAFEKEIAAFESE CD123 3.6LQAYKGKGNPEVEALRDEAAWIREELQAYRHN 378MGSWVEFVDRLWAIDERLDALGGSEAELAAFEKEIAAFESE CD123 3.2LQAYKGKGNPEVEFLRTWAAWIREDLQAYRHN 379MGSWFEFWDRLEAIWERLDALGGSEAELAAFEKEIAAFESE CD123 10.3LQAYKGKGNPEVEELRREAAIIREDLQAYRHN 380MGSWFEFEDRLEAIYQRLDALGGSEAELAAFEKEIAAFESE CD123 5.5LQAYKGKGNPEVEWLRDEAAWIRSDLQAYRHN 381MGSWFEFHDRLWAIDERLWALGGSEAELAAFEKEIAAFESE CD123 3.5LQAYKGKGNPEVEILREEAADIRLDLQAYRHN 382MGSWYEFEDRLWAIDNRLWALGGSEAELAAFEKEIAAFESE CD123 4.9LQAYKGKGNPEVEELRVHAADIRDDLQAYRHN 383MGSWFEFQDRLWAIDNRLWALGGSEAELAAFEKEIAAFESE CD123 3.2LQAYKGKGNPEVEELRDHAAMIRWELQAYRHN 384MGSWDEFEERLFAIDERLWALGGSEAELAAFEKEIAAFESE CD123 5LQAYKGKGNPEVEALRYLAADIREELQAYRHN 385MGSWEEFWERLDAIDTRLWALGGSEAELAAFEKEIAAFESE CD123 6.8LQAYKGKGNPEVEVLRNDAADIREPLQAYRHN 386MGSWMEFWERLEAIDMRLWALGGSEAELAAFEKEIAAFESE CD123 4.2LQAYKGKGNPEVEYLRDDAAVIRDDLQAYRHN 387MGSWLEFMWRLDAIDERLWALGGSEAELAAFEKEIAAFESE CD123 5.1LQAYKGKGNPEVELLREMAAAIRDDLQAYRHN 388MGSWTEFYNRLDAIDQRLWALGGSEAELAAFEKEIAAFESE CD123 3.3LQAYKGKGNPEVEMLREYAADIRTDLQAYRHN 389MGSWWEFIWRLEAIEQRLWALGGSEAELAAFEKEIAAFESE CD123 4LQAYKGKGNPEVEVLRSRAADIRTDLQAYRHN 390MGSWSEFYDRLWAIEERLFALGGSEAELAAFEKEIAAFESE CD123 17LQAYKGKGNPEVEYLRYYAAEIREELQAYRHN 391MGSWSEFEDRLWAIDQRLFALGGSEAELAAFEKEIAAFESE CD123 4.2LQAYKGKGNPEVEWLRAYAADIRWELQAYRHN 392MGSWTEFWERLNAIDERLFALGGSEAELAAFEKEIAAFESE CD123 4LQAYKGKGNPEVEWLRLYAAEIRSELQAYRHN 393MGSWWEFEERLWAIDYRLHALGGSEAELAAFEKEIAAFESE CD123 4.1LQAYKGKGNPEVEMLRSWAAEIRALLQAYRHN 394MGSWWEFENRLWAIEERLEALGGSEAELAAFEKEIAAFESE CD123 5.6LQAYKGKGNPEVEMLRNYAAEIRWELQAYRHN 395MGSWVEFEERLWAIDERLGALGGSEAELAAFEKEIAAFESE CD123 4.1LQAYKGKGNPEVEWLRDWAADIRWWLQAYRHN 396MGSWVEFEERLEAIEERLFALGGSEAELAAFEKEIAAFESE CD123 3.8LQAYKGKGNPEVEWLRDDAANIRHWLQAYRHN 397MGSWMEFEERLWAIDSRLWALGGSEAELAAFEKEIAAFESE CD123 3.2LQAYKGKGNPEVEWLRSEAAWIRMELQAYRHN 398MGSWSEFEHRLEAIESRLFALGGSEAELAAFEKEIAAFESE CD123 7.6LQAYKGKGNPEVEDLRSEAAWIREQLQAYRHN 399MGSWFEFWERLDAIEWRLWALGGSEAELAAFEKEIAAFESE CD123 3.4LQAYKGKGNPEVEELRSTAADIRRYLQAYRHN 400MGSWFEFWGRLEAIESRLKALGGSEAELAAFEKEIAAFESE CD123 4.9LQAYKGKGNPEVEELREHAAWIRAYLQAYRHN 401MGSWQEFTMRLDAIYNRLETLGGSEAELAAFEKEIAAFESE CD123 13.7LQAYKGKGNPEVEWLRQSAANIRSELQAYRHN 402MGSWSEFNMRLDAIYERLTALGGSEAELAAFEKEIAAFESE CD123 13.7LQAYKGKGNPEVEWLRHSAARIRLELQAYRHN 403MGSWSEFNMRLDAIYERLTALGGSEAELAAFEKEIAAFESE CD123 11.4LQAYKGKGNPEVEWLRHSAALIRLELQAYRHN 404MGSWIEFNMRLDAIYERLVALGGSEAELAAFEKEIAAFESE CD123 11.4LQAYKGKGNPEVEWLRKVAANIRLELQAYRHN 405MGSWYEFHHRLDAIYERLLALGGSEAELAAFEKEIAAFESE CD123 11.9LQAYKGKGNPEVEWLRSSAANIRKELQAYRHN 406MGSWYEFAKRLDAIYERLVALGGSEAELAAFEKEIAAFESE CD123 15.3LQAYKGKGNPEVEWLRSSAANIREELQAYRHN 407MGSWTEFYVRLDAIYERLDALGGSEAELAAFEKEIAAFESE CD123 16LQAYKGKGNPEVEWLRMVAANIRTELQAYRHN 408MGSWVEFYTRLDAIYGRLDALGGSEAELAAFEKEIAAFESE CD123 14.4LQAYKGKGNPEVEWLRQVAANIRMELQAYRHN 409MGSWVEFHMRLDAIYERLDALGGSEAELAAFEKEIAAFESE CD123 9.1LQAYKGKGNPEVEWLRTAAANIRVELQAYRHN 410MGSWYEFAIRLDAIYERLHALGGSEAELAAFEKEIAAFESE CD123 25.5LQAYKGKGNPEVEYLRVWAANIRTELQAYRHN 411MGSWNEFVIRLDAIYERLLALGGSEAELAAFEKEIAAFESE CD123 16.6LQAYKGKGNPEVEYLRMAAANIRMELQAYRHN 412MGSWSEFYVRVDAIYARLSALGGSEAELAAFEKEIAAFESE CD123 14.7LQAYKGKGNPEVEKLRVWAANIRHELQAYRHN 413MGSWSEFHVRLDAIYARLDALGGSEAELAAFEKEIAAFESE CD123 14.4LQAYKGKGNPEVERLREWAANIRRELQAYRHN 414MGSWVEFHLRLDAIYGRLMALGGSEAELAAFEKEIAAFESE CD123 17.5LQAYKGKGNPEVENLRVWAANIRNELQAYRHN 415MGSWVEFEMRLDAIVGRLYALGGSEAELAAFEKEIAAFESE CD123 25.3LQAYKGKGNPEVEKLRRWAANIRSELQAYRHN 416MGSWVEFNIRLDAIYERLYALGGSEAELAAFEKEIAAFESE CD123 13.4LQAYKGKGNPEVEKLRHWAASIRRELQAYRHN 417MGSWHEFGVRLDAIYDRLMALGGSEAELAAFEKEIAAFESE CD123 15.6LQAYKGKGNPEVEFLRQAAANIRSELQAYRHN 418MGSWTEFNLRLDAIYDRLMALGGSEAELAAFEKEIAAFESE CD123 14.4LQAYKGKGNPEVEWLRASAAAIRVELQAYRHN 419MGSWTEFNLRLDAIYGRLSALGGSEAELAAFEKEIAAFESE CD123 19.3LQAYKGKGNPEVEFLRAAAANIRVELQAYRHN 420MGSWVEFNWRLDAIYDRLVALGGSEAELAAFEKEIAAFESE CD123 9.3LQAYKGKGNPEVEWLRVSAAKIRGELQAYRHN 421MGSWNEFAWRLDAIYSRLAALGGSEAELAAFEKEIAAFESE CD123 17.7LQAYKGKGNPEVEWLRVAAANIRYELQAYRHN 422MGSWTEFAWRLDAIYDRLLALGGSEAELAAFEKEIAAFESE CD123 16.1LQAYKGKGNPEVEWLRHVAANIRRELQAYRHN 423MGSWVEFSIRLDAIYTRLVALGGSEAELAAFEKEIAAFESE CD123 15.1LQAYKGKGNPEVEMLRKGAANIRKELQAYRHN 424MGSWVEFYIRLDAIYVRLMALGGSEAELAAFEKEIAAFESE CD123 16.1LQAYKGKGNPEVEKLRSYAANIRQELQAYRHN 425MGSWYEFSMRLDAIYDRLMALGGSEAELAAFEKEIAAFESE CD123 13LQAYKGKGNPEVEQLRGYAANIRNELQAYRHN 426MGSWVEFIYRLDAIYDRLEALGGSEAELAAFEKEIAAFESE CD123 17LQAYKGKGNPEVEVLRRYAANIRNELQAYRHN 427MGSWIEFEVRLDAIYNRLAALGGSEAELAAFEKEIAAFESE CD123 20.8LQAYKGKGNPEVERLRRYAANIRHELQAYRHN 428MGSWFEFYDRLDAIYMRLIALGGSEAELAAFEKEIAAFESE CD123 13.6LQAYKGKGNPEVEVLRRYAANIRAELQAYRHN 429MGSWFEFYMRLDAIYDRLTALGGSEAELAAFEKEIAAFESE CD123 13.1LQAYKGKGNPEVERLRTFAANIRKELQAYRHN 430MGSWYEFDYRLDAIYDRLAALGGSEAELAAFEKEIAAFESE CD123 24.9LQAYKGKGNPEVERLRKWAANIREELQAYRHN 431MGSWSEFYLRLDAIYDRLDALGGSEAELAAFEKEIAAFESE CD123 15.7LQAYKGKGNPEVEWLRKTAANIREELQAYRHN 432MGSWFEFYERLDAINWRLFALGGSEAELAAFEKEIAAFESE CD123 3LQAYKGKGNPEVEALRGEAAAIREDLQAYRHN 433MGSWNEFEDRLDAIWWRLFALGGSEAELAAFEKEIAAFESE CD123 5.1LQAYKGKGNPEVEALRVEAAFIRTMLQAYRHN 434MGSWFYFKDDLADINYMLEALGGSEAELAMFEDDIAGFELT CD123 3.7LLKYKGKGNPEVEALRKEAAAIRDELQAYRHN 435MGSWHFFKDDLAWIKNELEALGGSEAELAMFEDDIAMFETM CD123 3.2LQSYKGKGNPEVEALRKEAAAIRDELQAYRHN 436MGSWHWFKTDLADIKEELEALGGSEAELAMFEDDIAEFEEF CD123 3.5LQMYKGKGNPEVEALRKEAAAIRDELQAYRHN 437MGSWWLFKDDLAEIKYWLEALGGSEAELAFFEDDIAEFERG CD123 3.3LQIYKGKGNPEVEALRKEAAAIRDELQAYRHN 438MGSWYEFKDDLAEIKEWLEALGGSEAELAFFELDIADFEWL CD123 3.8LQLYKGKGNPEVEALRKEAAAIRDELQAYRHN 439MGSWQWFKDDLAYIKETLEALGGSEAELALFEDMIADFEFE CD123 6.3LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 440MGSWILFKDDLAWIKETLEALGGSEAELAFFEDNIADFEEQ CD123 6LQGYKGKGNPEVEALRKEAAAIRDELQAYRHN 441MGSWIVFKDDLADIKRWLEALGGSEAELAMFEDEIADFEWQ CD123 3.9LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 442MGSWGHFKQDLAWIKDTLEALGGSEAELAFFEDDIAMFEME CD123 4.9LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 443MGSWGYFKDDLAWIKGELEALGGSEAELAEFEWFIAVFEED CD123 4.5LQVYKGKGNPEVEALRKEAAAIRDELQAYRHN 444MGSWYWFKDDLAEIKGLLEALGGSEAELAEFEDEIAVFEQE CD123 10.4LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 445MGSWMFFKEDLADIKWALEALGGSEAELAFFEEEIALFEQH CD123 3.2LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 446MGSWTFFKEDLAGIKWELEALGGSEAELAWFEDEIALFEEE CD123 7LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 447MGSWVFFKDDLADIKDELEALGGSEAELAFFEIAIALFEWE CD123 8.8LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 448MGSWTFFKNDLAEIKDWLEALGGSEAELADFEWDIAEFEYS CD123 3.9LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 449MGSWTYFKDDLADIKQWLEALGGSEAELAFFEIEIAEFEEE CD123 4.6LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 450MGSWTVFKYDLADIKWWLEALGGSEAELADFEEEIAEFEEE CD123 3.9LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 451MGSWYWFKQDLAHIKSMLEALGGSEAELAWFEEDIADFESE CD123 3.3LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 452MGSWTFFKWDLADIKANLEALGGSEAELAWFEEDLAGFEAE CD123 4.8LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 453MGSWSFFKEELANIQVYLEALGGSEAELAWFEEDIADFEED CD123 3.8LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 454MGSWEFFKYELADIKDELEALGGSEAELAWFEEDIATFEEW CD123 3.4LQGYKGKGNPEVEALRKEAAAIRDELQAYRHN 455MGSWQTFKDELAHIKWELEALGGSEAELAWFEWDIANFEEE CD123 5.5LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 456MGSWYWFKEELAFIKWELEALGGSEAELALFEEDIAYFEEM CD123 9.4LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 457MGSWNSFKDELAEIKAELEALGGSEAELAFFEEDIAWFEEH CD123 3.3LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 458MGSWDLFKWELAEIKLGLEALGGSEAELAEFEYDIAWFEED CD123 3.4LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 459MGSWIFFKQDLAEIKLNLEALGGSEAELAWFEDDIAWFESH CD123 3.8LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 460MGSWHLFKWTLAEIKYELEALGGSEAELAWFEDDIATFEEE CD123 4LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 461MGSWVTFKDELADIKDFLEALGGSEAELAFFEVDIAEFEAE CD123 7.6LQFYKGKGNPEVEALRKEAAAIRDELQAYRHN 462MGSWVYFKDELADIKDFLEALGGSEAELAEFEEDIATFEYD CD123 4.6LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 463MGSWETFKYELAEIKDYLEALGGSEAELAWFEDDIAEFEFE CD123 4.4LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 464MGSWNTFKYELAEIKHFLEALGGSEAELAMFEDDIAMFEWE CD123 5LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 465MGSWYVFKDELAEIKQFLEALGGSEAELAWFEDDIAEFETQ CD123 9.9LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 466MGSWIFFKEQLAIIKWELEALGGSEAELAWFEDDIAAFEDD CD123 15LQFYKGQGNPEVEALRKEAAAIRDELQAYRHN 467MGSWEFFKEVLAEIKYDLEALGGSEAELAWFETDIAGFEID CD123 8.2LQVYKGKGNPEVEALRKEAAAIRDELQAYRHN 468MGSWVFFKEDLATIKNDLEALGGSEAELAWFEMMIADFEAD CD123 3.1LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 469MGSWEEFKEDLAEIKVWLEALGGSEAELAWFEMGIADFEDG CD123 4.3LQFYKGKGNPEVEALRKEAAAIRDELQAYRHN 470MGSWHWFKEDLANIKDWLEALGGSEAELAWFEDNIADFEGD CD123 3.3LQVYKGKGNPEVEALRKEAAAIRDELQAYRHN 471MGSWFWFKEDLAFIKEDLEALGGSEAELAWFEDGIAFFEWD CD123 13.7LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 472MGSWQWFKEDLAEIKHDLEALGGSEAELAWFEDFIAQFEFD CD123 3.8LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 473MGSWHWFKEDLAIIKQDLEALGGSEAELATFEQWIAEFEWD CD123 5.5LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 474MGSWNWFKEDLAIIKMDLEALGGSEAELAWFEHNIAGFEFE CD123 3.1LQGYKGKGNPEVEALRKEAAAIRDELQAYRHN 475MGSWSWFKEDLAEIKMELEALGGSEAELAYFEWYIAEFEFQ CD123 4.8LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 476MGSWSWFKQDLADIKIQLEALGGSEAELAWFEWDIAEFEFE CD123 4LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 477MGSWSWFKEDLADIKFELEALGGSEAELAWFELDIADFEQA CD123 6.8LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 478MGSWSWFKEDLASIKAVLEALGGSEAELAFFESDIAEFEQE CD123 6.9LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 479MGSWWEFKEDLAEIKWFLEALGGSEAELAWFEHDIAKFEFE CD123 5.1LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 480MGSWEWFKSDLASIKWELEALGGSEAELAWFEHDIAEFEED CD123 5.7LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 481MGSWNEFKDDLAMIKMTLEALGGSEAELAWFEHDIAEFEDD CD123 3.5LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 482MGSWTFFKDDLAEIKWMLEALGGSEAELAWFESDIAYFEDE CD123 3.3LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 483MGSWSDFKDDLAEIKMILEALGGSEAELAYFENDIAWFEDD CD123 4.7LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 484MGSWSMFKDDLAEIKASLEALGGSEAELAWFEDDIAWFEDD CD123 5.2LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 485MGSWQYFKDDLAEIKMVLEALGGSEAELAWFEADIAMFEDD CD123 3.6LQIYKGKGNPEVEALRKEAAAIRDELQAYRHN 486MGSWSFFKDDLAEIKYFLEALGGSEAELAMFEQTIAEFEYD CD123 10.1LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 487MGSWMEFKEELAEIKYILEALGGSEAELAWFEQSIADFEYD CD123 5LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 488MGSWAWFKEDLAEIKVFLEALGGSEAELAEFEVSIADFEYE CD123 3.5LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 489MGSWYEFKFDLAEIKEQLEALGGSEAELALFEDDIAFFEYD CD123 4.6LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 490MGSWYDFKYDLAEIKMDLEALGGSEAELAQFEFDIAFFEEE CD123 3.2LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 491MGSWYIFKEDLAEIKEELEALGGSEAELAYFEEEIALFEME CD123 11.1LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 492MGSWVLFKEELAYIKFELEALGGSEAELALFENVIAIFESN CD123 3.5LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 493MGSWQDFKEDLAWIKYELEALGGSEAELAFFEYDIAIFENN CD123 3.2LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 494MGSWDHFKNDLAWIKKHLEALGGSEAELAEFEAVIAYFELY CD123 3.3LQGYKGKGNPEVEALRKEAAAIRDELQAYRHN 495MGSWYDFKEDLADIKWMLEALGGSEAELAEFENVIAYFEND CD123 8LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 496MGSWYMFKEELADIKWYLEALGGSEAELAWFEDDIAGFEWD CD123 7LQAYKGKGNPEVEALRKEAAAIRDELQAYRHN 497MGSWYYFKDELADIKWDLEALGGSEAELAWFEMLIAQFELD CD123 4LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 498MGSWMYFKDTLADIKWYLEALGGSEAELAFFEDWIAEFEDD CD123 3.1LQVYKGKGNPEVEALRKEAAAIRDELQAYRHN 499MGSWYQFKHDLADIKYGLEALGGSEAELAWFEDDIADFELD CD123 4.7LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 500MGSWYVFKDDLADIKYMLEALGGSEAELAWFEWEIANFEFD CD123 3.8LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 501MGSWNFFKYDLADIMAYLEALGGSEAELAFFEDEIANFEHD CD123 4.4LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 502MGSWHWFKIVLADIKDGLEALGGSEAELAYFETTIADFEMD CD123 4.3LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 503MGSWHWFKIVLADIKDGLEALGGSEAELAYFETTIADFEMD CD123 3.5LHHYKGKGNPEVEALRKEAAAIRDELQAYRHN 504MGSWFMFKEELADIKDWLEALGGSEAELASFESYIAWFEQD CD123 5.7LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 505MGSWFMFKQELAWIKEDLEALGGSEAELADFEWDIAEFEWD CD123 7.2LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 506MGSWQIFKGELAYIKQYLEALGGSEAELAFFEFDIAEFEED CD123 4.7LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 507MGSWDFFKEELAEIKHYLEALGGSEAELAFFEFWIADFEQD CD123 3.7LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 508MGSWFNFKEELAVIKFQLEALGGSEAELAFFEWVIADFEDD CD123 6.1LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 509MGSWYQFKTELAWIKDDLEALGGSEAELAWFEWVIADFEDD CD123 6.6LQFYKGKGNPEVEALRKEAAAIRDELQAYRHN 510MGSWFEFKDYLADIKWDLEALGGSEAELAIFEHDIAYFEHN CD123 3.8LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 511MGSWVRFKDFLADIKMDLEALGGSEAELADFEYHIAEFEHN CD123 5.8LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 512MGSWWLFKEQLALIKYNLEALGGSEAELADFESWIAEFEHQ CD123 4.1LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 513MGSWHVFKTELADIKFYLEALGGSEAELAMFELWIAEFEHE CD123 5.4LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 514MGSWIWFKDWLADIKDLLEALGGSEAELAEFEYDIALFEDQ CD123 7.3LQAYKGKGNPEVEALRKEAAAIRDELQAYRHN 515MGSWGWFKHELAFIKADLEALGGSEAELAWFEEEIAEFEYE CD123 3.3LQFYKGKGNPEVEALRKEAAAIRDELQAYRHN 516MGSWTWFKDNLAWIKEDLEALGGSEAELAWFELEIASFETA CD123 6.9LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 517MGSWTYFKNDLAGIKEDLEALGGSEAELAQFEFEIAEFEWL CD123 3.6LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 518MGSWTWFKWDLADIKGDLEALGGSEAELAFFEEEIAEFEWR CD123 5.9LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 519MGSWLYFKEYLADIKSDLEALGGSEAELAWFEYEIADFEEQ CD123 3.7LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 520MGSWHWFKEELAEIKEDLVALGGSEAELAWFEYDIAMFELS CD123 3.1LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 521MGSWNDFKEELAWIKFDLEALGGSEAELAWFEEDIAMFEQQ CD123 3.8LQAYKGKGNPEVEALRKEAAAIRDELQAYRHN 522MGSWWDFKDWLAEIKHDLEALGGSEAELALFESEIADFEFG CD123 4.2LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 523MGSWDEFKEDLAHIKTDLEALGGSEAELALFEDEIADFEMY CD123 6.3LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 524MGSWDFFKYDLANINEWLEALGGSEAELADFEYGIADFELW CD123 5.5LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 525MGSWYQFKDDLAHIKHLLEALGGSEAELAVFEYIIADFESF CD123 4LQIYKGKGNPEVEALRKEAAAIRDELQAYRHN 526MGSWAEFKHDLADIKRELEALGGSEAELAWFELSIAFFEDE CD123 3.3LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 527MGSWVVFKQDLADINHQLEALGGSEAELAWFEWEIADFEWE CD123 3.6LQHYKGKGNPEVEALRKEAAAIRDELQAYRHN 528MGSWFQFKEFLAMITHNLEALGGSEAELAEFEHDIALFESE CD123 3.1LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 529MGSWHWFKEDLAMITDVLEALGGSEAELAAFESEIAVFEAD CD123 5.2LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 530MGSWSWFQWDLAGIKDHLEALGGSEAELAEFESEIAYFEDE CD123 12.9LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 531MGSWTEFKGELAEIKWILEALGGSEAELAFFEDEIAAFEWD CD123 8.2LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 532MGSWFEFKWTLALIKQELEALGGSEAELADFEQEIAEFEWW CD123 4.9LQTYKGKGNPEVEALRKEAAAIRDELQAYRHN 533MGSWAEFKQRLAAIKTRLEALGGSEAELAAFMDEIMAFEWE CD123 3.4LWAYKGKGNPEVEALMNEAFAIDVELYAYRHN 534MGSWAEFKQRLAAIKTRLEALGGSEAELAAFEWEIVAFFSE CD123 3.6LFAYKGKGNPEVEALRDEAIAIETELVAYRHN 535MGSWWEFDHRLTAIDTRLQALGGSEAELAEFESSIAEFEWW CD123 4.3LQDYKGKGNPEVEALFAEAEAIYVELDAYRHN 536MGSWWEFQFRLYAIDQRLLALGGSEAELAEFEQDIADFEWM CD123 3.1LQDYKGKGNPEVEALMLEADAIEAELKAYRHN 537MGSWYEFDHRLDAIYQRLWALGGSEAELAEFEYGIAEFEEY CD123 4.6LQDYKGKGNPEVEALISEAWAIEWELSAYRHN 538MGSWYEFDMRLDAIWERLTALGGSEAELADFEQYIAEFERQ CD123 13.7LQDYKGKGNPEVEALFDEAWAIEDELYAYRHN 539MGSWSEFDSRLDAIAYRLFALGGSEAELAQFEWIIADFEED CD123 4.3LQMYKGKGNPEVEALFSEAYAIEIELNAYRHN 540MGSWYEFDDRLDAIAYRLNALGGSEAELAWFEWEIAEFELD CD123 4.6LQWYKGKGNPEVEALVWEADAIEWELEAYRHN 541MGSWFEFDERLDAIGSRLTALGGSEAELASFEFYIADFEEW CD123 3.8LQQYKGKGNPEVEALEWEAFAIDEELGAYRHN 542MGSWEEFDQRLDAIDVRLYALGGSEAELAEFEFDIAAFEEW CD123 3.6LQLYKGKGNPEVEALNMEAFAITDELCAYRHN 543MGSWEEFDVRLDAIFNRLWALGGSEAELAEFEFDIAWFEMD CD123 4.7LQEYKGKGNPEVEALFDEAEAITNELVAYRHN 544MGSWEEFDKRLDAITRRLMALGGSEAELAEFESTIAWFEWD CD123 4.5LQEYKGKGNPEVEALDWEAYAIDYELGAYRHN 545MGSWYEFDHRLEAIYDRLWALGGSEAELAFFEFDIADFEWD CD123 4.5LQSYKGKGNPEVEALFDEAAAIGHELLAYRHN 546MGSWNEFDDRLLAIWGRLDALGGSEAELAFFEEQIAGFEDE CD123 4.1LQWYKGKGNPEVEALDQEAEAIEKELWAYRHN 547MGSWVEFDDRLDAIWERLDALGGSEAELAWFEEQIAVFEHQ CD123 5LQDYKGKGNPEVEALNQEAEAIDLELKAYRHN 548MGSWTEFDDRLFAIYWRLDALGGSEAELAWFEEVIAEFEND CD123 6.4LQVYKGKGNPEVEALDDEAHAISIELEAYRHN 549MGSWSEFDQRLEAIWNRLDALGGSEAELADFEREIAYFENQ CD123 3.4LQWYKGKGNPEVEALNNEAFAIVDELGAYRHN 550MGSWYEFDERLWAIWERLDALGGSEAELAHFEWVIADFEND CD123 3.6LQWYKGKGNPEVEALEFEAEAIVTELHAYRHN 551MGSWMEFDYRLEAIWMRLIALGGSEAELADFESSIADFEHH CD123 3.1LQSYKGKGNPEVEALEWEAFAIGVELDAYRHN 552MGSWYEFESRLEAIWWRLEALGGSEAELAQFEQYIADFEQH CD123 4.4LQWYKGKGNPEVEALDWEADAIWLELQAYRHN 553MGSWEEFYMRLVAIHMRLRALGGSEAELAVFENYIAEFEEY CD123 4.4LQYYKGKGNPEVEALTIEADAIGTELGAYRHN 554MGSWDEFYYRLVAITHRLHALGGSEAELAWFEDDIAGFEWD CD123 5.4LQTYKGKGNPEVEALYKEAGAIGMELTAYRHN 555MGSWEEFDTRLLAIFGRLGALGGSEAELALFEMLIAKFEDD CD123 6.7LQNYKGKGNPEVEALSEEAFAIDHELGAYRHN 556MGSWREFDQRLWAIDWRLEALGGSEAELAMFEWMIATFEDD CD123 3.4LQWYKGKGNPEVEALYREAFAIDWELDAYRHN 557MGSWEEFHERLDAIDERLEALGGSEAELAFFEDDIASFEDW CD123 4.3LQWYKGKGNPEVEALSREADAINFELEAYRHN 558MGSWNEFYERLEAIDRRLFALGGSEAELALFEWMIADFEDD CD123 5.2LQMYKGKGNPEVEAINEAGAIGFELEAYRHN 559MGSWTEFTQRLEAIVDRLFALGGSEAELAEFENSIADFEWD CD123 3.9LQWYKGKGNPEVEALNREAVAIDNELWAYRHN 560MGSWVEFIMRLDAIYERLDALGGSEAELAEFEWHIADFEDH CD123 6.4LQWYKGKGNPEVEALFEEADAIWEELWAYRHN 561MGSWNEFLLRLDAIEHRLFALGGSEAELAEFEWEIADFEDD CD123 3.2LQWYKGKGNPEVEALVEEAEAIDVELVAYRHN 562MGSWYEFNMRLGAIDDRLQALGGSEAELAWFEDMIAIFEDD CD123 3.8LQIYKGKGNPEVEALEQEAAAIHQELWAYRHN 563MGSWEEFHWRLGAIDARLEALGGSEAELAWFEDGIADFEAI CD123 3.3LQDYKGKGNPEVEALDSEAVAIHHELWAYRHN 564MGSWYEFYERLWAIDDRLWALGGSEAELAEFEDSIATFEPS CD123 3.6LQMYKGKGNPEVEALVAEAWAIFDELAAYRHN 565MGSWFEFDQRLDAITFRLWALGGSEAELAEFEDVIALFEYH CD123 3.2LQDYKGKGNPEVEALEVEAWAIFHELGAYRHN 566MGSWSEFWFRLDAIEDRLWALGGSEAELAEFEDNIALFEYS CD123 4.5LQHYKGKGNPEVEALVKEANAIDDELGAYRHN 567MGSWYEFWDRLTAIEHRLWALGGSEAELAYFEDSIAHFEGS CD123 4.4LQVYKGKGNPEVEALYKEAEAIEWELEAYRHN 568MGSWYEFDDRLWAIFDRLFALGGSEAELAFFEDSIAEFEEE CD123 4.7LQHYKGKGNPEVEALYLEAWAIENELGAYRHN 569MGSWNEFVERLSAIDHRLWALGGSEAELADFEQQIAEFEIH CD123 3.2LQEYKGKGNPEVEALDFEADAIFDELLAYRHN 570MGSWSEFVDRLDAIFDRLWALGGSEAELAWFEDTIAHFEWN CD123 5.3LQEYKGKGNPEVEALNGEADAITDELHAYRHN 571MGSWAEFDSRLDAIAQRLFALGGSEAELAHFEDFIAQFEYS CD123 3.6LQEYKGKGNPEVEALSNEADAIFNELKAYRHN 572MGSWAEFDSRLIAIFDRLWALGGSEAELAWFEDDIAQFEQH CD123 3.6LQAYKGKGNPEVEALRQEADAITFELKAYRHN 573MGSWTEFEERLEAIWDRLYALGGSEAELAAFEWDIAYFEDG CD123 5.9LQEYKGKGNPEVEALFMEAEAIIRELKAYRHN 574MGSWYEFEDRLAAIWDRLNALGGSEAELAIFEWDIAWFEEG CD123 6.4LQEYKGKGNPEVEALKHEASAIQTELFAYRHN 575MGSWLEFESRLWAIWDRLDALGGSEAELAHFEQDIADFEMS CD123 3.4LQEYKGKGNPEVEALIREAEAIETELYAYRHN 576MGSWMEFEDRLIAIWARLDALGGSEAELAWFEADIADFEES CD123 3.7LQEYKGKGNPEVEALIFEAIAINKELMAYRHN 577MGSWFEFTIRLEAIQDRLDALGGSEAELAWFEWDIAEFEEG CD123 3.5LQFYKGKGNPEVEALHTEADAIMNELVAYRHN 578MGSWYEFVSRLDAIEYRLWALGGSEAELAWFEWDIADFEQG CD123 3.2LQFYKGKGNPEVEALAQEANAIGSELTAYRHN 579MGSWEEFDYRLYAIQDRLYALGGSEAELAFFEWEIADFEHM CD123 4.4LQMYKGKGNPEVEALFQEADAIDAELHAYRHN 580MGSWIEFFHRLDAIQDRLDALGGSEAELAYFEWAIADFEHM CD123 3.5LQLYKGKGNPEVEALQFEAFAIEGELYAYRHN 581MGSWYEFSSRLNAIDDRLWALGGSEAELAYFETDIADFESL CD123 3.8LQWYKGKGNPEVEALLNEADAIDYELYAYRHN 582MGSWFEFEYRLDAIIDRLFALGGSEAELAEFESMIANFEYS CD123 4LQEYKGKGNPEVEALYFEADAIVDELTAYRHN 583MGSWLEFEYRLDAIYDRLFALGGSEAELAAFEQDIADFEKY CD123 3.1LQYYKGKGNPEVEALWEEADAIMWELFAYRHN 584MGSWHEFEERLMAIEDRLWALGGSEAELAEFEQWIALFEYD CD123 5.8LQEYKGKGNPEVEALGMEAFAINNELSAYRHN 585MGSWYEFEERLDAIEDRLIALGGSEAELAIFEDIIAFFEQD CD123 4.1LQYYKGKGNPEVEALEMEAEAISIELDAYRHN 586MGSWHEFEKRLYAIEDRLIALGGSEAELAWFEDSIAWFEWD CD123 3.6LQMYKGKGNPEVEALNEEADAIYQELDAYRHN 587MGSWIEFEDRLDAITDRLWALGGSEAELAEFEHQIAFFEED CD123 9.5LQWYKGKGNPEVEALHMEAEAIMEELGAYRHN 588MGSWMEFEDRLMAIVDRLWALGGSEAELADFEWNIAMFEEE CD123 6.8LQWYKGKGNPEVEALGDEAEAIEWELYAYRHN 589MGSWEEFEDRLFAIDSRLWALGGSEAELAEFENIIASFEEV CD123 3.7LQEYKGKGNPEVEALSVEAFAIDRELGAYRHN 590MGSWEEFLFRLEAIQDRLWALGGSEAELAWFEYEIASFEDV CD123 8.2LQSYKGKGNPEVEALSTEAKAIDYELFAYRHN 591MGSWVEFDNRLFAIDERLWALGGSEAELAWFEEEIASFEDN CD123 3.3LQKYKGKGNPEVEALQLEAFAIMEELDAYRHN 592MGSWFEFDDRLEAIFDRLWALGGSEAELAMFEFAIAEFEDA CD123 4.1LQEYKGKGNPEVEALYEEAVAIDEELYAYRHN 593MGSWFEFDARLMAINDRLWALGGSEAELAAFEYHIALFEDQ CD123 4LQMYKGKGNPEVEALTLEAVAINEELWAYRHN 594MGSWVEFDSRLAAIDYRLEALGGSEAELAWFEYTIANFEHT CD123 3.4LQMYKGKGNPEVEALVYEAHAIATELQAYRHN 595MGSWTEFDERLDAIDWRLEALGGSEAELAWFEGDIALFEQY CD123 4.5LQVYKGKGNPEVEALMEEADAIKAELDAYRHN 596MGSWIEFDERLDAIDFRLWALGGSEAELAWFEGWIAEFESD CD123 7LQLYKGKGNPEVEALNEEANAIFHELSAYRHN 597MGSWWEFDSRLDAIDFRLWALGGSEAELAWFEVEIADFEDW CD123 3.2LQLYKGKGNPEVEALWHEADAIVTELYAYRHN 598MGSWYEFDERLDAIFDRLWALGGSEAELAYFEQVIATFEKT CD123 3LQRYKGKGNPEVEALDTEAKAISWELDAYRHN 599MGSWYEFQERLDAIDSRLWALGGSEAELAWFEYTIAEFEKE CD123 5.5LQMYKGKGNPEVEALGTEAVAISEELMAYRHN 600MGSWEEFEDRLWAIDGRLYALGGSEAELAWFEQWIATFEED CD123 9.4LQDYKGKGNPEVEALEYEASAIFEELEAYRHN 601MGSWFEFGDRLEAIDERLYALGGSEAELAQFEWWIAEFEHH CD123 4.5LQDYKGKGNPEVEALEYEADAIWGELHAYRHN 602MGSWFEFNDRLDAISERLSALGGSEAELAYFEWQIAVFEKT CD123 3.9LQNYKGKGNPEVEALTLEANAIFEELEAYRHN 603MGSWVEFMDRLEAIEERLSALGGSEAELAFFEWEIAEFEEH CD123 4LQVYKGKGNPEVEALEWEALAITEELAAYRHN 604MGSWIEFMDRLWAIDQRLWALGGSEAELAWFEEEIAWFEEE CD123 6.5LQVYKGKGNPEVEALEWEATAISEELWAYRHN 605MGSWEEFNWRLRAIDERLFALGGSEAELAWFEYDIAEFEEQ CD123 5.4LQVYKGKGNPEVEALRVEAAAIAEELYAYRHN 606MGSWWEFEIRLDAIDERLWALGGSEAELAWFEQSIAFFEND CD123 3.2LQVYKGKGNPEVEALRWEANAIIEELFAYRHN 607MGSWYEFEWRLDAIDRRLWALGGSEAELADFEEEIADFEWM CD123 10LQNYKGKGNPEVEALVDEASAIQTELWAYRHN 608MGSWYEFVYRLRAIDERLDALGGSEAELAMFEFEIAFFEDQ CD123 4.5LQRYKGKGNPEVEALVDEAQAIDFELFAYRHN 609MGSWWEFEDRLYAIDDRLWALGGSEAELAQFEREIAQFEIW CD123 5.5LQEYKGKGNPEVEALDDEATAINSELFAYRHN 610MGSWDEFEFRLEAIDSRLWALGGSEAELAVFEYEIAQFEFM CD123 3.6LQEYKGKGNPEVEALGMEAWAIENELFAYRHN 611MGSWEEFEWRLDAIDERLWALGGSEAELATFEYEIAIFENE CD123 4.3LQQYKGKGNPEVEALDSEAYAIERELGAYRHN 612MGSWYEFFDRLDAIDERLWALGGSEAELAWFEAEIAEFEME CD123 3.7LQGYKGKGNPEVEALDVEAHAIEMELFAYRHN 613MGSWYEFMGRLEAIDERLQALGGSEAELAWFEHEIAEFEWS CD123 3.5LQWYKGKGNPEVEALRFEAGAIPWELWAYRHN 614MGSWVEFSNRLDAIWERLQALGGSEAELAYFEWEIAEFEWE CD123 5.1LQSYKGKGNPEVEALNAEADAIEWELEAYRHN 615MGSWEEFHMRLIAIDERLWALGGSEAELAGFEESIAYFESQ CD123 3.9LQDYKGKGNPEVEALDYEAHAIWRELYAYRHN 616MGSWWEFKYRLDAICFRLAALGGSEAELASFEDEIAYFEED CD123 3.1LQGYKGKGNPEVEALDYEALAIWDELAAYRHN 617MGSWDEFAMRLEAIQARLFALGGSEAELAIFEDEIAFFETM CD123 3.7LQDYKGKGNPEVEALEYEAAAIEAELGAYRHN 618MGSWWEFNARLDAIEDRLMALGGSEAELAYFEDIIASFENI CD123 3.4LQQYKGKGNPEVEALWYEAYAIEKELNAYRHN 619MGSWIEFWNRLEAIEERLYALGGSEAELAYFEDEIAEFEIY CD123 5.2LQQYKGKGNPEVEALKHEAEAINKELMAYRHN 620MGSWNEFVIRLFAIDDRLYALGGSEAELAWFEDEIATFEYE CD123 3.5LQRYKGKGNPEVEALEYEAEAIVSELFAYRHN 621MGSWYEFLARLYAIDERLWALGGSEAELATFEHWIADFEEQ CD123 4.5LQSYKGKGNPEVEALTDEAVAIGEELSAYRHN 622MGSWLEFETRLHAIDERLWALGGSEAELAEFEEHIAWFEED CD123 4.6LQFYKGKGNPEVEALDFEADAIGWELWAYRHN 623MGSWFEFETRLEAIDLRLWALGGSEAELATFEDVIAFFEDW CD123 6.6LQFYKGKGNPEVEALKMEAWAIGEELHAYRHN 624MGSWHEFWQRLEAIEGRLWALGGSEAELADFESLIADFEEQ CD123 7LQEYKGKGNPEVEALMAEAEAIDNELRAYRHN 625MGSWYEFEQRLEAIEWRLGALGGSEAELATFEEDIADFEEW CD123 4.4LQEYKGKGNPEVEALQYEAYAIAEELHAYRHN 626MGSWYEFENRLFAIEERLWALGGSEAELAWFEYEIANFEWG CD123 3.3LQSYKGKGNPEVEALDNEAEAIDIELAAYRHN 627MGSWYEFEQRLGAIEERLWALGGSEAELAAFEDIIAYFEYQ CD123 10.6LQSYKGKGNPEVEALDEEAWAIDDELWAYRHN 628MGSWWEFEQRLDAIETRLWALGGSEAELAYFEHIIADFEDE CD123 4.7LQIYKGKGNPEVEALGWEAFAIDGELTAYRHN 629MGSWFEFPYRLEAIEERLYALGGSEAELAQFEQFIAWFEMD CD123 3.1LQDYKGKGNPEVEALWFEANAIVEELDAYRHN 630MGSWVEFYDRLEAIEIRLWALGGSEAELADFESFIAHFEDD CD123 4LQAYKGKGNPEVEALMDEANAIVFELDAYRHN 631MGSWVEFWDRLDAIEERLWALGGSEAELAEFEFMIAMFEQH CD123 10LQEYKGKGNPEVEALIPEAGAIDKELTAYRHN 632MGSWDEFDARLWAIEERLWALGGSEAELAEFEFMIAAFEDV CD123 4.3LQEYKGKGNPEVEALMGEANAIVMELDAYRHN 633MGSWYEFWRRLDAIEERLWALGGSEAELAMFETDIAGFEWM CD123 3.6LQLYKGKGNPEVEALEHEAWAINSELDAYRHN 634MGSWHEFIWRLDAIEERLWALGGSEAELAWFETEIATFEAQ CD123 3.3LQDYKGKGNPEVEALEWEAIAIAWELDAYRHN 635MGSWYEFYWRLEAIEERLWALGGSEAELAEFEKAIATFEDQ CD123 3.7LQTYKGKGNPEVEALETEALAIHAELEAYRHN 636MGSWFEFQWRLEAIEDRLWALGGSEAELAEFETIIAGFEEQ CD123 3.4LQVYKGKGNPEVEALEEEAMAIQTELHAYRHN 637MGSWWEFEDRLWAIEQRLDALGGSEAELAVFENSIAKFEDM CD123 4.4LQVYKGKGNPEVEALHEEADAIIWELYAYRHN 638MGSWWEFEDRLWAIDRRLMALGGSEAELAVFEQMIAHFEQI CD123 4.6LQVYKGKGNPEVEALHFEAHAIGMELAAYRHN 639MGSWWEFLDRLEAIEYRLQALGGSEAELAVFEWEIAMFEDH CD123 3.1LQGYKGKGNPEVEALHSEAHAIISELSAYRHN 640MGSWAEFEDRLAAIERRLEALGGSEAELADFESSIAWFEPD CD123 4.2LQYYKGKGNPEVEALMYEAEAIFSELYAYRHN 641MGSWWEFYDRLTAIEARLWALGGSEAELADFEEGIADFEYD CD123 3.2LQDYKGKGNPEVEALFWEAWAIQSELTAYRHN 642MGSWYEFEDRLAAIEARLWALGGSEAELADFEEEIAYFEHG CD123 3.8LQWYKGKGNPEVEALESEAMAIIDELHAYRHN 643MGSWWEFSWRLEAIETRLDALGGSEAELAFFEMDIAWFEQD CD123 3.3LQLYKGKGNPEVEALEEEAYAIYEELEAYRHN 644MGSWEEFFFRLEAIDDRLYALGGSEAELALFEEVIAYFEQD CD123 3.2LQWYKGKGNPEVEALYVEAYAIQEELYAYRHN 645MGSWFEFEERLNAISWRLHALGGSEAELAYFEEDIAWFEDD CD123 13LQFYKGKGNPEVEALENEAYAIWEELDAYRHN 646MGSWFEFEERLEAIIYRLWALGGSEAELAMFEESIAWFESD CD123 3.7LQQYKGKGNPEVEALEYEAMAISKELKAYRHN 647MGSWAEFDDRLEAIEYRLHALGGSEAELAWFEEGIAGFEHA CD123 5.8LQSYKGKGNPEVEALETEAGAINEELWAYRHN 648MGSWDEFEERLQAIEYRLWALGGSEAELAWFEEVIAQFEYD CD123 3.8LQKYKGKGNPEVEALSTEAQAIQDELWAYRHN 649MGSWWEFTDRLDAIFDRLWALGGSEAELAAFEESIAIFEQD CD123 7.5LQYYKGKGNPEVEALEYEANAIQYELEAYRHN 650MGSWWEFTDRLEAIEDRLWALGGSEAELAHFEDSIAQFEQE CD123 16.6LQWYKGKGNPEVEALADEADAIESELHAYRHN 651MGSWVEFFWRLDAIEDRLWALGGSEAELANFEFEIADFEAW CD123 4LQKYKGKGNPEVEALHSEADAIQLELRAYRHN 652MGSWVEFYNRLDAIENRLWALGGSEAELAFFEELIAQFEFA CD123 6.9LQDYKGKGNPEVEALEDEADAIWEELMAYRHN 653MGSWEEFYYRLHAIDNRLWALGGSEAELAYFEWHIADFELE CD123 3LQDYKGKGNPEVEALSEEATAIFEELWAYRHN 654MGSWREFHDRLFAIDGRLWALGGSEAELANFEWDIADFEFE CD123 5.6LQDYKGKGNPEVEALSWEADAIMQELGAYRHN 655MGSWEEFDERLWAISDRLWALGGSEAELAYFEGEIAYFEQN CD123 6.5LQTYKGKGNPEVEALQTEALAIDTELWAYRHN 656MGSWEEFEQRLWAIDDRLWALGGSEAELAFFEYEIAEFEMD CD123 5.7LQWYKGKGNPEVEALFYEAHAINEELWAYRHN 657MGSWDEFHQRLAAIGDRLWALGGSEAELAYFEWEIATFEWD CD123 3.7LQVYKGKGNPEVEALYFEATAIDEELMAYRHN 658MGSWVEFEYRLDAISDRLWALGGSEAELAFFENEIASFESD CD123 6.5LQFYKGKGNPEVEALMFEAEAIDDELHAYRHN 659MGSWDEFDTRLDAIFSRLYALGGSEAELAMFEGEIAEFEGS CD123 4LQHYKGKGNPEVEALDFEAHAIDEELWAYRHN 660MGSWHEFDDRLDAIMSRLDALGGSEAELATFEAEIATFEFV CD123 7.7LQLYKGKGNPEVEALLAEAYAIDWELEAYRHN 661MGSWYEFFDRLDAIYDRLYALGGSEAELASFEAQIAEFEVE CD123 4.7LQSYKGKGNPEVEALEWEAWAIDEELYAYRHN 662MGSWFEFLYRLDAIEDRLWALGGSEAELAEFEQEIAKFESE CD123 6.6LQSYKGKGNPEVEALEWEAHAIDMELEAYRHN 663MGSWLEFEDRLVAIDHRLFALGGSEAELAEFEEEIALFESY CD123 3.9LQDYKGKGNPEVEALNWEADAIHAELYAYRHN 664MGSWYEFESRLDAIVDRLWALGGSEAELAEFEYEIAKFEWE CD123 5.1LQDYKGKGNPEVEALNWEAGAIEFELYAYRHN 665MGSWYEFEDRLDAILYRLLALGGSEAELAWFERDIAFFESE CD123 4.3LQWYKGKGNPEVEALEWEAMAIDDELFAYRHN 666MGSWGEFMDRLEAIDYRLWALGGSEAELAWFESDIAEFEQE CD123 4.6LQMYKGKGNPEVEALWDEAMAIRDELFAYRHN 667MGSWEEFDDRLDAIEHRLWALGGSEAELADFEGSIAAFESW CD123 4LQVYKGKGNPEVEALEAEAEAIADELWAYRHN 668MGSWYEFADRLDAIMDRLVALGGSEAELAYFEWEIAAFEEF CD123 3.3LQMYKGKGNPEVEALDEEAEAIKDELMAYRHN 669MGSWNEFWERLDAIEWRLFALGGSEAELAFFELDIAWFEEE CD123 3LQWYKGKGNPEVEALIFEAHAITLELDAYRHN 670MGSWYEFDARLDAIEERLYALGGSEAELAAFEFEIAGFEEA CD123 8.9LQWYKGKGNPEVEALLKEAEAITDELYAYRHN 671MGSWDEFSERLDAIWGRLEALGGSEAELATFEFHIAEFEHE CD123 3.2LQYYKGKGNPEVEALQGEAAAIINELYAYRHN 672MGSWDEFWDRLDAIEDRLFALGGSEAELADFERVIAWFEND CD123 3.9LQEYKGKGNPEVEALDNEADAIRIEHAYRHN 673MGSWDEFDDRLEAIVDRLFALGGSEAELAMFEFEIAQFEHQ CD123 5.6LQYYKGKGNPEVEALRDEADAIWIELDAYRHN 674MGSWEEFTIRLGAIYWRLFALGGSEAELANFEWFIAEFEYE CD123 3.3LQPYKGKGNPEVEALVIEANAIDGELQAYRHN 675MGSWFEFEWRLDAIENRLNALGGSEAELAWFEYHIAAFEDS CD123 3.3LQHYKGKGNPEVEALEWEAHAIQSELQAYRHN 676MGSWYEFDDRLEAIWDRLGALGGSEAELAAFEKEIAAFESE CD123 3.3LQAYKGKGNPEVEWLRETAADIRAELQAYRHN 677MGSWGEFWARLEAIWIRLDALGGSEAELAAFEKEIAAFESE CD123 15LQAYKGKGNPEVEWLREEAADIRRSLQAYRHN 678MGSWIEFEVRLDAIWDRLFALGGSEAELAAFEKEIAAFESE CD123 4.2LQAYKGKGNPEVEYLRDEAADIRQSLQAYRHN 679MGSWTEFDRRLDAIWDRLFALGGSEAELAAFEKEIAAFESE CD123 9.2LQAYKGKGNPEVEWLREEAADIRDYLQAYRHN 680MGSWTEFDMRLDAIWDRLFALGGSEAELAAFEKEIAAFESE CD123 3.1LQAYKGKGNPEVEELREEAATIRGVLQAYRHN 681MGSWEEFHDRLMAIETRLWALGGSEAELAAFEKEIAAFESE CD123 4.3LQAYKGKGNPEVEWLRYEAADIRDYLQAYRHN 682MGSWVEFRDRLDAIETRLWALGGSEAELAAFEKEIAAFESE CD123 4.2LQAYKGKGNPEVEWLRYEAAEIRMVLQAYRHN 683MGSWMEFIDRLDAIEHRLWALGGSEAELAAFEKEIAAFESE CD123 4.3LQAYKGKGNPEVEFLREEAAEIRMYLQAYRHN 684MGSWTEFVWRLDAIEWRLEALGGSEAELAAFEKEIAAFESE CD123 4.2LQAYKGKGNPEVEFLREEAAEIRDWLQAYRHN 685MGSWVEFYDRLYAIEVRLLALGGSEAELAAFEKEIAAFESE CD123 5.8LQAYKGKGNPEVEFLRQEAAEIRDWLQAYRHN 686MGSWYEFYDRLDAIEWRLWALGGSEAELAAFEKEIAAFESE CD123 6.2LQAYKGKGNPEVEWLRDEAAQIRDFLQAYRHN 687MGSWVEFYDRLDAIEHRLDALGGSEAELAAFEKEIAAFESE CD123 3.4LQAYKGKGNPEVEWLRDEAAFIRDMLQAYRHN 688MGSWFEFVDRLTAIQVRLWALGGSEAELAAFEKEIAAFESE CD123 5.1LQAYKGKGNPEVEYLREEAALIRYSLQAYRHN 689MGSWFEFLDRLDAIEERLWALGGSEAELAAFEKEIAAFESE CD123 12.2LQAYKGKGNPEVEWLREEAAVIRDSLQAYRHN 690MGSWYEFMVRLDAIEERLFALGGSEAELAAFEKEIAAFESE CD123 4.1LQAYKGKGNPEVEFLREEAASIRYHLQAYRHN 691MGSWYEFEDRLDAIQWRLWALGGSEAELAAFEKEIAAFESE CD123 6.3LQAYKGKGNPEVEFLRESAANIRQHLQAYRHN 692MGSWSEFEYRLFAIENRLDALGGSEAELAAFEKEIAAFESE CD123 3.2LQAYKGKGNPEVEFLREEAAMIRQLLQAYRHN 693MGSWVEFEYRLDAITERLLALGGSEAELAAFEKEIAAFESE CD123 3.9LQAYKGKGNPEVEILREEAAFIRQWLQAYRHN 694MGSWWEFLDRLDAIEMRLFALGGSEAELAAFEKEIAAFESE CD123 9LQAYKGKGNPEVEYLREEAALIRNMLQAYRHN 695MGSWWEFEDRLDAIEYRLFALGGSEAELAAFEKEIAAFESE CD123 4.9LQAYKGKGNPEVEFLREEAAFIRIFLQAYRHN 696MGSWWEFESRLDAIFMRLTALGGSEAELAAFEKEIAAFESE CD123 3.7LQAYKGKGNPEVEDLREDAAFIREFLQAYRHN 697MGSWVEFWHRLDAIKARLNALGGSEAELAAFEKEIAAFESE CD123 3.5LQAYKGKGNPEVEDLRWYAADFRLILQAYRHN 698MGSWYEFYNRLSAIYARLQALGGSEAELAAFEKEIAAFESE CD123 10.6LQAYKGKGNPEVEDLRWYAADIRYMLQAYRHN 699MGSWYEFYDRLSAIYARLQALGGSEAELAAFEKEIAAFESE CD123 5.3LQAYKGKGNPEVEDLRWYAADIRYMLQAYRHN 700MGSWNEFYDRLSAIYFRLQALGGSEAELAAFEKEIAAFESE CD123 10.6LQAYKGKGNPEVEHLRWYAADIRMILQAYRHN 701MGSWNEFYDRLSAIYFRLQALGGFEAELAAFEKEIAAFESE CD123 9LQAYKGKGNPEVEHLRWYAADIRMILQAYRHN 702MGSWEEFYDRLGAIFARLHALGGSEAELAAFEKEIAAFESE CD123 3.9LQAYKGKGNPEVEDLRWYAADIRMILQAYRHN 703MGSWVEFYDRLHAIYFRLLALGGSEAELAAFEKEIAAFESE CD123 4.8LQAYKGKGNPEVEDLRWYAADIRLVLQAYRHN 704MGSWKEFDNRLYAIEDRLRALGGSEAELAAFEKEIAAFESE CD123 3.9LQAYKGKGNPEVEHLRWYAADIRMILQAYRHN 705MGSWVEFWDRLWAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 4.5LQAYKGKGNPEVEHLRHYAADIRVWLQAYRHN 706MGSWYEFADRLWAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 4LQAYKGKGNPEVEFLRYYAADIRWVLQAYRHN 707MGSWYEFEERLYAIEDRLYALGGSEAELAAFEKEIAAFESE CD123 11.5LQAYKGKGNPEVEFLRQEAADIRLMLQAYRHN 708MGSWTEFEWRLYAIEDRLMALGGSEAELAAFEKEIAAFESE CD123 4.2LQAYKGKGNPEVEFLRDEAADIRQYLQAYRHN 709MGSWIEFESRLWAIEDRLLALGGSEAELAAFEKEIAAFESE CD123 8.7LQAYKGKGNPEVEFLRLEAADIREDLQAYRHN 710MGSWFEFEDRLDAIWDRLWALGGSEAELAAFEKEIAAFESE CD123 5.1LQAYKGKGNPEVEFLRMDAAMIRYILQAYRHN 711MGSWEEFEDRLWAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 4.1LQAYKGKGNPEVEILRYDAAYIREILQAYRHN 712MGSWIEFEDRLYAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 4LQAYKGKGNPEVEFLRYEAAEIRYWLQAYRHN 713MGSWYEFWDRLEAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 4.2LQAYKGKGNPEVEFLRYSAAEIRYQLQAYRHN 714MGSWVEFESRLAAIEHRLWALGGSEAELAAFEKEIAAFESE CD123 3.7LQAYKGKGNPEVEELREYAAEIRDWLQAYRHN 715MGSWWEFEHRLFAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 7.6LQAYKGKGNPEVEFLRDYAAEIRDYLQAYRHN 716MGSWYEFDSRLMAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 3.2LQAYKGKGNPEVEYLRQEAAEIRMILQAYRHN 717MGSWYEFEWRLMAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 3.4LQAYKGKGNPEVEYLRHEAAEIRDVLQAYRHN 718MGSWYEFYNRLDAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 11.3LQAYKGKGNPEVEYLRQEAADIRGQLQAYRHN 719MGSWWEFHDRLEAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 6.4LQAYKGKGNPEVEYLRIEAADIRRQLQAYRHN 720MGSWYEFWDRLEAIEERLWALGGSEAELAAFEKEIAAFESE CD123 4.6LQAYKGKGNPEVEYLRLEAADIRRILQAYRHN 721MGSWYEFEERLWAIEERLYALGGSEAELAAFEKEIAAFESE CD123 5.4LQAYKGKGNPEVEYLRYEAAWIRDFLQAYRHN 722MGSWYEFENRLEAIEERLWALGGSEAELAAFEKEIAAFESE CD123 6.1LQAYKGKGNPEVEMLREEAAFIRDWLQAYRHN 723MGSWYEFEYRLEAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 6.2LQAYKGKGNPEVEYLREEAAWIRVWLQAYRHN 724MGSWYEFENRLGAIGDRLWALGGSEAELAAFEKEIAAFESE CD123 4.8LQAYKGKGNPEVEWLRDEAAYIRAVLQAYRHN 725MGSWYEFEHRLDAIYDRLWALGGSEAELAAFEKEIAAFESE CD123 6.3LQAYKGKGNPEVEWLREEAAWIRLWLQAYRHN 726MGSWYEFEWRLDAIYDRLGALGGSEAELAAFEKEIAAFESE CD123 6LQAYKGKGNPEVEWLREDAAEIRALLQAYRHN 727MGSWVEFENRLEAIENRLWALGGSEAELAAFEKEIAAFESE CD123 6.2LQAYKGKGNPEVEWLREDAAQIRMMLQAYRHN 728MGSWYEFEERLEAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 6LQAYKGKGNPEVEWLREQAAFIRTMLQAYRHN 729MGSWFEFEWRLEAIFDRLYALGGSEAELAAFEKEIAAFESE CD123 6.9LQAYKGKGNPEVEVLRAEAAEIRLRLQAYRHN 730MGSWWEFEDRLMAIYDRLYALGGSEAELAAFEKEIAAFESE CD123 15.3LQAYKGKGNPEVEYLRAEAALIRETLQAYRHN 731MGSWFEFEDRLYAIEDRLYALGGSEAELAAFEKEIAAFESE CD123 4.7LQAYKGKGNPEVEYLRWGAATIRDELQAYRHN 732MGSWIEFWDRLEAIEDRLWALGGSEAELAAFEKEIAAFESE CD123 4.5LQAYKGKGNPEVEELRDEAAWIRDSLQAYRHN 733MGSWFEFWDRLDAIEDRLYALGGSEAELAAFEKEIAAFESE CD123 4.9LQAYKGKGNPEVEELRDEAAWIRGTLQAYRHN 734MGSWEEFTDRLWAIEDRLYALGGSEAELAAFEKEIAAFESE CD123 8.9LQAYKGKGNPEVEWLRDEAAFIRKSLQAYRHN 735MGSWVEFVDRLEAIEDRLFALGGSEAELAAFEKEIAAFESE CD123 4.9LQAYKGKGNPEVEFLRDQAAYIRFMLQAYRHN 736MGSWFEFVDRLEAIEMRLFALGGSEAELAAFEKEIAAFESE CD123 7.1LQAYKGKGNPEVELLRWRAAMIRYDLQAYRHN 737MGSWWEFEMRLEAIEDRLFALGGSEAELAAFEKEIAAFESE CD123 4LQAYKGKGNPEVESLRWEAAFIRDILQAYRHN 738MGSWFEFEIRLEAIEDRLFALGGSEAELAAFEKEIAAFESE CD123 3LQAYKGKGNPEVEFLRDEAAEIRQVLQAYRHN 739MGSWYEFYQRLEAIEDRLFALGGSEAELAAFEKEIAAFESE CD123 3LQAYKGKGNPEVEWLRDEAAEIRVVLQAYRHN 740MGSWIEFEDRLEAIEDRLFALGGSEAELAAFEKEIAAFESE CD123 21.8LQAYKGKGNPEVEWLRQEAAEIRLMLQAYRHN 741MGSWHEFYDRLDAIYFRLWALGGSEAELAAFEKEIAAFESE p26 9.6LQAYKGKGNPEVELLRLLAAEIRKELQAYRHN 742MGSWHEFITRLEAIDQRLWALGGSEAELAAFEKEIAAFESE p26 16.91LQAYKGKGNPEVEYLRFWAAEIRFILQAYRHN 743MGSWMEFFDRLVAIDERLWALGGSEAELAAFEKEIAAFESE p26 18.62LQAYKGKGNPEVEYLRMWAAEIRFLLQAYRHN 744MGSWVEFSGRLIAIDNRLWALGGSEAELAAFEKEIAAFESE p26 5.28LQAYKGKGNPEVEYLRMWAAEIRYILQAYRHN 745MGSWVEFHHRLFAIDERLWALGGSEAELAAFEKEIAAFESE p26 21.39LQAYKGKGNPEVEYLRMVAAEIRYILQAYRHN 746MGSWHEFMERLIAIDGRLWALGGSEAELAAFEKEIAAFESE p26 17.85LQAYKGKGNPEVEYLRFVAAFIRDVLQAYRHN 747MGSWKEFIQRLDAIHYRLWALGGSEAELAAFEKEIAAFESE p26 18.41LQAYKGKGNPEVEYLRFVAAFIRFELQAYRHN 748MGSWSEFIFRLDAIHSRLQALGGSEAELAAFEKEIAAFESE p26 28.3LQAYKGKGNPEVEYLRFIAAEIRLKLQAYRHN 749MGSWFEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESE p26 5.92LQAYKGKGNPEVENLRVHAAAIREWLQAYRHN 750MGSWLEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESE p26LQAYKGKGNPEVENLRVHAAAIREWLQAYRHN 751MGSWFEFYHRLNAIDARLWALGGSEAELAAFEKEIAAFESE p26LQAYKGKGNPEVENLRVHAAAIREWLQAYRHN 752MGSWFEFYDRLNAIDSRLWALGGSEAELAAFEKEIAAFESE p26LQAYKGKGNPEVENLRVHAAAIREWLQAYRHN 753MGSWFEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESE p26LQAYKGKGNPEVESLRVHAAAIREWLQAYRHN 754MGSWFEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESE p26LQAYKGKGNPEVENLRDHAAAIREWLQAYRHN 755MGSWFEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESE p26LQAYKGKGNPEVENLREHAAAIREWLQAYRHN 756MGSWFEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESE p26LQAYKGKGNPEVENLRVHAAHIREWLQAYRHN 757MGSWLEFYHRLNAIDSRLWALGGSEAELAAFEKEIAAFESE p26LQAYKGKGNPEVENLRVHAAAIREWLQAYRHN 758MGSWLEFYHRLNAIDSRLWALGGSEAELAAFEKEIAAFESE p26 19.23LQAYKGKGNPEVESLRDHAAHIREWLQAYRHN 759MGSWFEFYHRLNAIDSRLWALGGSEAELAAFEKEIAAFESE p26LQAYKGKGNPEVESLRDHAAHIREWLQAYRHN 760MGSWLEFYDRLNAIDSRLWALGGSEAELAAFEKEIAAFESE p26LQAYKGKGNPEVESLRDHAAHIREWLQAYRHN 761MGSWLEFYHRLNAIDARLWALGGSEAELAAFEKEIAAFESE p26LQAYKGKGNPEVESLRDHAAHIREWLQAYRHN 762MGSWLEFYHRLNAIDSRLWALGGSEAELAAFEKEIAAFESE p26LQAYKGKGNPEVENLRDHAAHIREWLQAYRHN 763MGSWLEFYHRLNAIDSRLWALGGSEAELAAFEKEIAAFESE p26LQAYKGKGNPEVESLRVHAAHIREWLQAYRHN 764MGSWLEFYHRLNAIDSRLWALGGSEAELAAFEKEIAAFESE p26LQAYKGKGNPEVESLRDHAAAIREWLQAYRHN 765MGSWFEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESE p26LQAYKGKGNPEVESLRDHAAHIREWLQAYRHN 766MGSWFEFYERLNAIDSRLWALGGSEAELAAFEKEIAAFESE p26 27.1LQAYKGKGNPEVEKLRAHAASIRTWLQAYRHN 767MGSWIEFYWRLEAIDQRLWALGGSEAELAAFEKEIAAFESE p26 9.4LQAYKGKGNPEVEDLRVHAAAIRWWLQAYRHN 768MGSWSEFVKRLDAIDQRLWALGGSEAELAAFEKEIAAFESE p26 27LQAYKGKGNPEVESLRVHAAAIRAWLQAYRHN 769MGSWEEFYYRLEAIDARLFALGGSEAELAAFEKEIAAFESE p26 30.3LQAYKGKGNPEVEELRVHAAHIRDWLQAYRHN 770MGSWVEFHYRLQAIDARLWALGGSEAELAAFEKEIAAFESE p26 14.8LQAYKGKGNPEVEELRVHAAHIRKWLQAYRHN 771MGSWVEFVGRLNAIDARLWALGGSEAELAAFEKEIAAFESE p26 26LQAYKGKGNPEVEELRHHAAEIRNWLQAYRHN 772MGSWNEFMDRLNAIDNRLWALGGSEAELAAFEKEIAAFESE p26 10LQAYKGKGNPEVENLRKQAASIRLWLQAYRHN 773MGSWNEFFQRLNAIDERLWALGGSEAELAAFEKEIAAFESE p26 28.7LQAYKGKGNPEVEDLRQHAANIRWWLQAYRHN 774MGSWYEFVVRLFAIDERLWALGGSEAELAAFEKEIAAFESE p26 18.25LQAYKGKGNPEVESLREHAAHIRSWLQAYRHN 775MGSWYEFYLRLDAIDHRLWALGGSEAELAAFEKEIAAFESE p26 16LQAYKGKGNPEVEMLREHAAHIRKWLQAYRHN 776MGSWYEFRARLLAIDERLWALGGSEAELAAFEKEIAAFESE p26 20.9LQAYKGKGNPEVEHLREHAAHIRNFLQAYRHN 777MGSWTEFWHRLEAIDSRLWALGGSEAELAAFEKEIAAFESE p26 13.19LQAYKGKGNPEVESLREHAAHIRVWLQAYRHN 778MGSWTEFQNRLNAIDHRLWALGGSEAELAAFEKEIAAFESE p26 30.5LQAYKGKGNPEVESLREHAAKIRVWLQAYRHN 779MGSWSEFFKRLEAIDRRLWALGGSEAELAAFEKEIAAFESE p26 30.2LQAYKGKGNPEVEELREHAAHIRVWLQAYRHN 780MGSWYEFQQRLEAIDTRLWALGGSEAELAAFEKEIAAFESE p26 27.3LQAYKGKGNPEVEELREHAAHIRHWLQAYRHN 781MGSWTEFEKRLHAIDYRLWALGGSEAELAAFEKEIAAFESE p26 17.1LQAYKGKGNPEVEDLREHAAAIRHWLQAYRHN 782MGSWTEFHQRLDAIDERLWALGGSEAELAAFEKEIAAFESE p26 24.4LQAYKGKGNPEVEFLREHAAKIRMWLQAYRHN 783MGSWLEFSQRLTAIDSRLWALGGSEAELAAFEKEIAAFESE p26 30.4LQAYKGKGNPEVENLREHAAKIRNWLQAYRHN 784MGSWTEFVNRLYAIDSRLWALGGSEAELAAFEKEIAAFESE p26 16.7LQAYKGKGNPEVEGLRTHAAKIRHWLQAYRHN 785MGSWMEFVDRLSAIDRRLWALGGSEAELAAFEKEIAAFESE p26 32.1LQAYKGKGNPEVEVLREHAANIRQWLQAYRHN 786MGSWVEFVSRLYAIDFRLWALGGSEAELAAFEKEIAAFESE p26 29LQAYKGKGNPEVEALREHAAQIRDWLQAYRHN 787MGSWSEFHTRLDAIDTRLWALGGSEAELAAFEKEIAAFESE p26 23.5LQAYKGKGNPEVEDLRRHAAAIRFWLQAYRHN 788MGSWLEFHSRLDAIDTRLWALGGSEAELAAFEKEIAAFESE p26 30.8LQAYKGKGNPEVEKLREHAAAIRHYLQAYRHN 789MGSWTEFYQRLDAIDTRLWALGGSEAELAAFEKEIAAFESE p26 29.7LQAYKGKGNPEVEGLRQQAAQIRAWLQAYRHN 790MGSWAEFSDRLNAIDQRLWALGGSEAELAAFEKEIAAFESE p26 25.3LQAYKGKGNPEVEILREHAAEIRKFLQAYRHN 791MGSWMEFNHRLQAIDGRLWALGGSEAELAAFEKEIAAFESE p26 33.4LQAYKGKGNPEVEMLREHAAAIRAFLQAYRHN 792MGSWYEFYKRLEAIDNRLYALGGSEAELAAFEKEIAAFESE p26 30.8LQAYKGKGNPEVEYLREHAAAIRHWLQAYRHN 793MGSWYEFYYRLEAIDNRLIALGGSEAELAAFEKEIAAFESE p26 29.6LQAYKGKGNPEVEVLREHAAKIREWLQAYRHN 794MGSWYEFVSRLEAIDDRLYALGGSEAELAAFEKEIAAFESE p26 33.1LQAYKGKGNPEVEMLRQHAAAIRHWLQAYRHN 795MGSWYEFSHRLEAIEDRLFALGGSEAELAAFEKEIAAFESE p26 26LQAYKGKGNPEVEPLREHAAYIRHWLQAYRHN 796MGSWFEFFERLAAIEDRLWALGGSEAELAAFEKEIAAFESE p26 20.3LQAYKGKGNPEVESLRVHAAAIRAFLQAYRHN 797MGSWIEFKYRLDAIEWRLEALGGSEAELAAFEKEIAAFESE p26 18.3LQAYKGKGNPEVESLRIHAAAIRTWLQAYRHN 798MGSWYEFMYRLDAIEYRLFALGGSEAELAAFEKEIAAFESE p26 19.4LQAYKGKGNPEVESLRIHAAMIREWLQAYRHN 799MGSWVEFVTRLEAIEDRLFALGGSEAELAAFEKEIAAFESE p26 11.7LQAYKGKGNPEVEHLRAHAAHIRHWLQAYRHN 800MGSWYEFVIRLDAIEDRLFALGGSEAELAAFEKEIAAFESE p26 30.1LQAYKGKGNPEVEHLRVHAAHIRVWLQAYRHN 801MGSWVEFVERLDAIEFRLFALGGSEAELAAFEKEIAAFESE p26 23.8LQAYKGKGNPEVEKLRNHAAHIRSWLQAYRHN 802MGSWSEFVHRLDAIEVRLFALGGSEAELAAFEKEIAAFESE p26 16.9LQAYKGKGNPEVEELRYHAAKIRSWLQAYRHN 803MGSWSEFYYRLAAIESRLFALGGSEAELAAFEKEIAAFESE p26 30.8LQAYKGKGNPEVERLREHAAHIRRWLQAYRHN 804MGSWYEFYLRLSAIEDRLFALGGSEAELAAFEKEIAAFESE p26 27.4LQAYKGKGNPEVESLRVQAAHIRTWLQAYRHN 805MGSWYEFYDRLDAIEDRLFALGGSEAELAAFEKEIAAFESE p26 31.9LQAYKGKGNPEVESLRDQAAYIRTWLQAYRHN 806MGSWHEFWVRLEAIESRLFALGGSEAELAAFEKEIAAFESE p26 26.9LQAYKGKGNPEVESLRVQAAHIRSWLQAYRHN 807MGSWVEFYHRLEAIEQRLMALGGSEAELAAFEKEIAAFESE p26 28.5LQAYKGKGNPEVESLREQAAAIRSWLQAYRHN 808MGSWVEFYERLNAIEYRLEALGGSEAELAAFEKEIAAFESE p26 28.7LQAYKGKGNPEVESLREHAAYIRQWLQAYRHN 809MGSWVEFYHRLDAIFDRLDALGGSEAELAAFEKEIAAFESE p26 20LQAYKGKGNPEVEELRANAAGIRSWLQAYRHN 810MGSWSEFTDRLFAIEDRLLALGGSEAELAAFEKEIAAFESE p26 25.4LQAYKGKGNPEVEDLRMHAASIRLWLQAYRHN 811MGSWHEFYDRLYAIWDRLDALGGSEAELAAFEKEIAAFESE p26 22.91LQAYKGKGNPEVEGLRNAAAVIRIFLQAYRHN 812MGSWFEFSNRLYAIWHRLTALGGSEAELAAFEKEIAAFESE p26 15.25LQAYKGKGNPEVESLRTQAAFIRILLQAYRHN 813MGSWFEFSDRLYAIWERLDALGGSEAELAAFEKEIAAFESE p26 18.99LQAYKGKGNPEVESLRFQAAFIRYQLQAYRHN 814MGSWFEFEDRLFAIWTRLEALGGSEAELAAFEKEIAAFESE p26 10.89LQAYKGKGNPEVESLRQSAASIRWLLQAYRHN 815MGSWHEFSERLFAIWTRLEALGGSEAELAAFEKEIAAFESE p26 8.21LQAYKGKGNPEVEALRQSAAFIRVMLQAYRHN 816MGSWGEFTVRLYAIDRRLDALGGSEAELAAFEKEIAAFESE p26 8.54LQAYKGKGNPEVEELRRFAAIIRAFLQAYRHN 817MGSWYEFDHRLMAISFRLVALGGSEAELAAFEKEIAAFESE p26 20.1LQAYKGKGNPEVETLRRRAANIRHLLQAYRHN 818MGSWSIFKYHLADIKLLLEALGGSEAELAYFEFLIADFEFT p26 20.21LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 819MGSWHHFKYFLADIKSILEALGGSEAELAIFEVQIAYFEDL p26 8LQSYKGKGNPEVEALRKEAAAIRDELQAYRHN 820MGSWLYFKYNLAVIKHWLEALGGSEAELAIFEMSIADFEYE p26 13.3LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 821MGSWFYFKYELAWIKHWLEALGGSEAELASFETHIAFFEHQ p26 13.7LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 822MGSWADFKWTLAYIKHRLEALGGSEAELAFFEMEIAYFEQS p26 31.5LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 823MGSWAYFKGQLAYIKSGLEALGGSEAELAYFELRIAYFEHW p26 11.4LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 824MGSWENFKDTLAWIKEYLEALGGSEAELAGFEHRIAIFEHY p26 19.2LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 825MGSWVLFKDYLADIKHYLEALGGSEAELANFEHLIANFEGD p26 13.8LQTYKGKGNPEVEALRKEAAAIRDELQAYRHN 826MGSWSLFKHRLANIKVYLEALGGSEAELADFETFIAYFEKD p26 19.6LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 827MGSWEHFKVELAGIKAYLEALGGSEAELALFEWAIADFESI p26 18.1LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 828MGSWIYFKDELAGIKKYLEALGGSEAELAMFEVAIADFEAI p26 15.9LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 829MGSWVLFKQELAWIKWLLEALGGSEAELAAFEEQIARFEHD p26 29.5LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 830MGSWVLFKQELAWIKWYLEALGGSEAELAAFEWEIAAFEQR p26 22.5LQIYKGKGNPEVEALRKEAAAIRDELQAYRHN 831MGSWFLFKSELAWIKWRLEALGGSEAELAYFEYQIAEFEFW p26 25.8LQSYKGKGNPEVEALRKEAAAIRDELQAYRHN 832MGSWLLFKSELAWIKWYLEALGGSEAELAEFEWNIAEFEKN p26 25.7LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 833MGSWLLFKSDLAWIKWRLEALGGSEAELAEFEESIAMFEHW p26 33.3LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 834MGSWLYFKSDLAWIKWRLEALGGSEAELADFEEAIAEFEQA p26 21.2LQIYKGKGNPEVEALRKEAAAIRDELQAYRHN 835MGSWKLFKYELAWIKWRLEALGGSEAELADFEASIAQFEKY p26 23.4LQTYKGKGNPEVEALRKEAAAIRDELQAYRHN 836MGSWYLFKNELAWIKWRLEALGGSEAELADFEMVIAMFEDH p26 31.1LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 837MGSWVYFKAHLAFIKWELEALGGSEAELANFESTIAEFEKY p26 20.8LQVYKGKGNPEVEALRKEAAAIRDELQAYRHN 838MGSWMYFKSHLAWIKWELEALGGSEAELAFFEDNIAQFEYW p26 19.8LQLYKGKGNPEVEALRKEAAAIRDELQAYRHN 839MGSWTLFKWDLAFIKWQLEALGGSEAELAWFEYEIAAFEDS p26 12.1LQNYKGKGNPEVEALRKEAAAIRDELQAYRHN 840MGSWILFKEDLAFIKWQLEALGGSEAELAWFETTIANFESD p26 23.3LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 841MGSWYFFKSRLAYIKVYLEALGGSEAELAGFEWEIAHFEEW p26 30.1LQRYKGKGNPEVEALRKEAAAIRDELQAYRHN 842MGSWYIFKSELAWIKWYLEALGGSEAELANFEVEIATFETW p26 29.6LQGYKGKGNPEVEALRKEAAAIRDELQAYRHN 843MGSWYIFKQELASIKLSLEALGGSEAELAHFEAEIAWFEWW p26 19.4LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 844MGSWVRFKTELAYIKESLEALGGSEAELAMFESEIAIFEHS p26 20.5LQTYKGKGNPEVEALRKEAAAIRDELQAYRHN 845MGSWYLFKTELAAIKYRLEALGGSEAELASFEYEIAWFEHI p26 20.1LQFYKGKGNPEVEALRKEAAAIRDELQAYRHN 846MGSWYWFKYELAEIKWHLEALGGSEAELAHFEHSIAVFESQ p26 21.5LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 847MGSWWVFKKTLAEIKWTLEALGGSEAELAYFEAEIAFFEFI p26 18.6LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 848MGSWVYFKDHLAEIKSQLEALGGSEAELALFEYDIAWFEFI p26 22.1LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 849MGSWVYFKHRLAEIKDQLEALGGSEAELAEFETDIAWFEWM p26 11.1LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 850MGSWIIFKTDLARIKNYLEALGGSEAELATFERDIAWFEFM p26 16.7LQIYKGKGNPEVEALRKEAAAIRDELQAYRHN 851MGSWMHFKQDLAEIKGYLEALGGSEAELAIFEMDIAWFEYM p26 18.9LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 852MGSWQIFKQDLAAIKDYLEALGGSEAELAIFEFDIAWFEHM p26 17.4LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 853MGSWLAFKEDLAHIKSILEALGGSEAELAEFEHDIAWFEYM p26 18.6LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 854MGSWFVFKEDLAGIKFILEALGGSEAELAMFETDIAWFEYM p26 14.2LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 855MGSWTHFKEDLAHIKDRLEALGGSEAELAAFELDIAWFEFM p26 30.4LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 856MGSWYYFKERLAAIKDRLEALGGSEAELAIFEADIAWFEFM p26 31.5LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 857MGSWYTFKGSLAEIKNRLEALGGSEAELAMFESDIAWFEFM p26 32.3LQFYKGKGNPEVEALRKEAAAIRDELQAYRHN 858MGSWFTFKDDLAQIKNRLEALGGSEAELANFEMSIAWFEFM p26 30.8LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 859MGSWVLFKQDLAMIKQRLEALGGSEAELAMFEYDIAWFEHM p26 29.7LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 860MGSWVEFKRDLANIKQRLEALGGSEAELAQFEMQIAWFEHT p26 30.4LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 861MGSWSYFKEDLANIKSSLEALGGSEAELAWFESSIAWFEHT p26 11.6LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 862MGSWSIFKQDLADIKDSLEALGGSEAELAMFEMDIAWFEHT p26 16.6LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 863MGSWEIFKDDLASIKKVLEALGGSEAELALFESDIAWFELM p26 27.9LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 864MGSWSIFKDDLAVIKERLEALGGSEAELAHFEQDIAWFEHL p26 25.6LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 865MGSWSVFKDDLAQIKDRLEALGGSEAELAQFELDIAWFEYV p26 30.3LQFYKGKGNPEVEALRKEAAAIRDELQAYRHN 866MGSWAVFKDSLAHIKDVLEALGGSEAELALFEMDIAWFEYV p26 24.1LQDYKGKGNPEVEALRKEAAAIRDELQAYRHN 867MGSWIAFKDHLAIIKQRLEALGGSEAELARFEFEIAWFEWM p26 29.9LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 868MGSWIHFKNDLAVIKDELEALGGSEAELARFEIMIAWFEDA p26 17.9LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 869MGSWMVFKQDLAEIKANLEALGGSEAELADFEFAIAWFEYE p26 17.8LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 870MGSWKNFKLELALIKSKLEALGGSEAELAQFEADIAFFEWS p26 20.6LQWYKGKGNPEVEALRKEAAAIRDELQAYRHN 871MGSWHSFKQDLAYIKYLLEALGGSEAELAQFEELIAFFEYY p26 25.6LQTYKGKGNPEVEALRKEAAAIRDELQAYRHN 872MGSWVVFKSSLAQIKILLEALGGSEAELAIFEVKIAHFEQE p26 8.6LQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 873MGSWDQFKNSLASIKRVLEALGGSEAELAIFEVKIAHFEHF p26 15.6LQQYKGKGNPEVEALRKEAAAIRDELQAYRHN 874MGSWNNFKSSLASIKQVLEALGGSEAELAVFELQIAHFERE p26 24.1LQYYKGKGNPEVEALRKEAAAIRDELQAYRHN 875MGSWVEFGHRLWAIDQRLYALGGSEAELAAFEKEIAAFESE CD137LQAYKGKGNPEVEKLRQRAAFIRFRLQAYRHN 876MGSWAEFKQRLAAIKTRLEALGGSEAELAAFLGEIWAFEME CD137LAAYKGKGNPEVEALGREAAAIRMELQAYRHN (BB10) 877MGSWYEFDLRLHAIYDRLVALGGSEAELAAFEKEIAAFESE CD47LQAYKGKGNPEVEILRDNAAYIRQMLQAYRHN 878MGSWHEFHDRLQAIHERLYALGGSEAELAAFEKEIAAFESE CTLA4LQAYKGKGNPEVESLRIAAAHIRQVLQAYRHN 879MGSWNYFKDHLAWIKNSLEALGGSEAELAHFETAIASFERQ DRSLQEYKGKGNPEVEALRKEAAAIRDELQAYRHN 880MGSWLWFKIFLAEIKYFLEALGGSEAELAAFDFEIHAFHVE KIRLFAYKGKGNPEVEVLREVAAEIRWDLQAYRHN 881MGSWTEFQSRLDAIHSRLRALGGSEAELAAFEKEIAAFESE PDL1LQAYKGKGNPEVELLRDDAAFIRHFLQAYRHN 882MGSWVVFKVDLATIKYILEALGGSEAELAEFEGEIAGFEYS TIM3LQFYKGKGNPEVEALRKEAAAIRDELQAYRHN 883MGSWTIFKEWLAFIKTDLEALGGSEAELAFFEGWIASFEME PD1LQKYKGKGNPEVEALRKEAAAIRDELQAYRHN 884MGSWEEFELRLNAIEERLYALGGSEAELAYFEYVIADFEGN CD19LQRYKGKGNPEVEALYFEADAIFEELVAYRHN 885MGSWVVFKQRLAYIKDLLEALGGSEAELAYFEMSIAFFEED CD22LQVYKGKGNPEVEALRKEAAAIRDELQAYRHN 886MGSWVEFYERLDAIDRRLWALGGSEAELAAFEKEIAAFESELQAYK p26GKGNPEVEELRVHAASIRAWLQAYRHN 887MGSWFEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESELQAYK p26GKGNPEVESLRAHAAAIREWLQAYRHN 888MGSWSEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESELQAYK p26GKGNPEVESLRVHAAAIREWLQAYRHN 889MGSWSEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESELQAYK p26GKGNPEVESLRAHAAAIREWLQAYRHN 890MGSWSEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESELQAYK p26GKGNPEVESLKAHAAAIREWLQAYRHN 891MGSWSEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESELQAYK p26GKGNPEVESLQAHAAAIREWLQAYRHN 892MGSWSEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESELQAYK p26GKGNPEVESLRAHAAGIREWLQAYRHN 893MGSWFEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESELQAYK p26GKGNPEVESLREHAAHIREWLQAYRHN 894MGSWFEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESELQAYK p26GKGNPEVESLREHAAAIREWLQAYRHN 895MGSWSEFYDRLNAIDARLWALGGSEAELAAFEKEIAAFESELQAYK p26GKGNPEVESLREHAAAIREWLQAYRHN 896MGSWVEFEARLSAIYERLEALGGSEAELAAFEKEIAAFESELQAYK CS1GKGNPEVEKLRRHAAGIRSNLQAYRHN 897MGSWVEFFVRLDAIWERLEALGGSEAELAAFEKEIAAFESELQAYK CS1GKGNPEVETLRFHAAGIRQKLQAYRHN 898MGSWTEFNLRLDAIYERLEALGGSEAELAAFEKEIAAFESELQAYK CS1GKGNPEVEALRWHAAGIRQQLQAYRHN 899MGSWMEFYDRLDAIWVRLEALGGSEAELAAFEKEIAAFESELQAYK CS1GKGNPEVEVLRFHAAGIREQLQAYRHN 900MGSWHEFNGRLWAIYARLDALGGSEAELAAFEKEIAAFESELQAYK CS1GKGNPEVETLRRHAAGIRGILQAYRHN 901MGSWYEFVQRLHAINDRLSALGGSEAELAAFEKEIAAFESELQAYK CS1GKGNPEVEVLRRHAAGIRYTLQAYRHN 902MGSWAEFYQRLNAIWNRLEALGGSEAELAAFEKEIAAFESELQAYK CS1GKGNPEVEVLRRHAAGIRGQLQAYRHN 903MGSWVEFNERLHAIYLRLDALGGSEAELAAFEKEIAAFESELQAYK CS1GKGNPEVETLRRHAAGIRWQLQAYRHN 904MGSWNEFKLELAFIKDWLEALGGSEAELANFEEAIAEFEAGLQGYK CS1GKGNPEVEALRKEAAAIRDELQAYRHN 905MGSWMEFEARLEAIWDRLEALGGSEAELAAFEKEIAAFESELQAYK CS1GKGNPEVESLRFHAAGIRQHLQAYRHN 906MGSWVEFEDRLNAIWWRLEALGGSEAELAAFEKEIAAFESELQAYK CS1GKGNPEVEKLRRHAAGIRTQLQAYRHN 907MGSWHHFKMHLAGIKLQLEALGGSEAELAEFEEWIADFEGALQDYK CS1GKGNPEVEALRKEAAAIRDELQAYRHN 908MGSWAEFFARLDAIWERLEALGGSEAELAAFEKEIAAFESELQAYK CS1GKGNPEVETLRFHAAGIRQKLQAYRHN 909MGSWAEFFARLDAIWDRLEALGGSEAELAAFEKEIAAFESELQAYK CS1GKGNPEVETLRFHAAGIRQKLQAYRHN 910MGSWAEFFARLDAIWERLEALGGSEAELAAFEKEIAAFESELQAYK CS1GKGNPEVETLKFHAAGIRQKLQAYRHN 911MGSWHEFRWRLFAIWQRLHALGGSEAELAAFEKEIAAFESELQAYK HER2 10.02GKGNPEVEWLRLDAALIRVMLQAYRHN 912MGSWAEFRWRLHAIWLKLGELGGSEAELAAFEKEIAAFESELQAYK HER2GKGNPEVEWLREDAEQIKYILQAYRHN 913MGSWAEFRWALHAIWLKLGELGGSEAELAAFEKEIAAFESELQAYK HER2GKGNPEVEWLREDAEQIKYILQAYRHN 914MGSWAEFRWRLHAIWLKLGALGGSEAELAAFEKEIAAFESELQAYK HER2GKGNPEVEWLRQDAAQIKYILQAYRHN 915MGSWAEFRWRLHAIWLQLGALGGSEAELAAFEKEIAAFESELQAYK HER2GKGNPEVEWLRQDAAQIKYILQAYRHN 916MGSWAEFRWRLHAIWLRLGALGGTEAELAAFEKEIAAFESELQAYK HER2GKGNPEVEWLRQDAAQIKYILQAYRHN 917MGSWAEFRWRLHAIWLRLGALGGSEAELAAFEKEIAAFESELQAYK HER2GKGNPEVEWLRQDAAQIKYILQAYRHN 918MGSWAEFRWKLEAIWLRLGALGGSEAELAAFEKEIAAFESELQAYK HER2GKGNPEVEWLRQDAAQIKYILQAYRHN 919MGSWAEFRWKLGAIWLRLGALGGSEAELAAFEKEIAAFESELQAYK HER2GKGNPEVEWLRQDAAQIKYILQAYRHN 920MGSWYEFRWRLHAIWLRLGALGGSEAELAAFEKEIAAFESELQAYK HER2 7.18GKGNPEVEWLRQDAAQIRYILQAYRHN 921MGSWHEFLRRLLAIEMRLYALGGSEAELAAFEKEIAAFESELQAYK HER2 8.15GKGNPEVEHLRVRAASIRQMLQAYRHN 922MGSWWGFKVNLAWIKWKLEALGGSEAELAYFELWIANFEHSLQEYK HER2 8.69GKGNPEVEALRKEAAAIRDELQAYRHN 923MGSWVNFKTHLARIKVHLEALGGSEAELALFEHDIANFEQVLQQYK HER2 7.91GKGNPEVEALRKEAAAIRDELQAYRHN 924MGSWLVFKDELAGIKNYLEALGGSEAELATFEQDIAWFEQWLQNYK HER2 3.28GKGNPEVEALRKEAAAIRDELQAYRHN 925MGSWKTFKIELAGIKLELEALGGSEAELAGFENAIAQFESSLQYYK HER2 4.95GKGNPEVEALRKEAAAIRDELQAYRHN 926MGSWWEFKVRLSAIQYRLYALGGSEAELAAFEKEIAAFESELQAYK HER2 5.17GKGNPEVEALREQAALIRTILQAYRHN 927MGSWWEFHIRLHAINYRLAALGGSEAELAAFEKEIAAFESELQAYK HER2 11.90GKGNPEVEALRELAAKIRGDLQAYRHN 928MGSWWEFQVRLRAIQYRLNALGGSEAELAAFEKEIAAFESELQAYK HER2 14.39GKGNPEVEYLRGLAAQIRFDLQAYRHN 929MGSWWEFKIRLYAIEYRLNALGGSEAELAAFEKEIAAFESELQAYK HER2 4.49GKGNPEVEALRAKAAQIRYNLQAYRHN 930MGSWFEFNIRLHAIEYRLKALGGSEAELAAFEKEIAAFESELQAYK HER2 7.86GKGNPEVEELRNYAASIRKLLQAYRHN 931MGSWFEFEIRLRAIEYRLSALGGSEAELAAFEKEIAAFESELQAYK HER2 7.75GKGNPEVEKLRELAAEIRYALQAYRHN 932MGSWFEFKIRLYAIQYRLSALGGSEAELAAFEKEIAAFESELQAYK HER2 13.08GKGNPEVEELRNLAAEIRHSLQAYRHN 933MGSWWEFKVRLRAIEYRLSALGGSEAELAAFEKEIAAFESELQAYK HER2 10.09GKGNPEVEELRVLAASIRIHLQAYRHN 934MGSWSEFWFRLHAILYRLQALGGSEAELAAFEKEIAAFESELQAYK HER2 14.79GKGNPEVETLRDAAAEIRVALQAYRHN 935MGSWIEFWVRLNAILYRLYALGGSEAELAAFEKEIAAFESELQAYK HER2 3.91GKGNPEVEALRDSAAEIRRWLQAYRHN 936MGSWVEFWIRLNAIKYRLLALGGSEAELAAFEKEIAAFESELQAYK HER2 10.62GKGNPEVEKLRQDAADIRELLQAYRHN 937MGSWTEFWWRLSAIVYRLNALGGSEAELAAFEKEIAAFESELQAYK HER2 5.76GKGNPEVEELRDMAADIRSLLQAYRHN 938MGSWWEFYLRLRAISYRLQALGGSEAELAAFEKEIAAFESELQAYK HER2 5.10GKGNPEVEGLRQDAAEIRKLLQAYRHN 939MGSWWEFHVRLRAIEYRLEALGGSEAELAAFEKEIAAFESELQAYK HER2 5.48GKGNPEVEQLRLIAANIRHLLQAYRHN 940MGSWWEFHVRLKAIEYRLLALGGSEAELAAFEKEIAAFESELQAYK HER2 4.56GKGNPEVEDLRYIAANIRQLLQAYRHN 941MGSWWEFKVRLKAIEYRLLALGGSEAELAAFEKEIAAFESELQAYK HER2GKGNPEVEDLRYIAANIRQLLQAYRHN 942MGSWWEFQVRLAAIEYRLKALGGSEAELAAFEKEIAAFESELQAYK HER2 6.33GKGNPEVENLRQLAAHIRSVLQAYRHN 943MGSWWEFQVRLSAIEYRLTALGGSEAELAAFEKEIAAFESELQAYK HER2 9.61GKGNPEVEELRQKAARIRSLLQAYRHN 944MGSWWEFNIRLHAIDYRLKALGGSEAELAAFEKEIAAFESELQAYK HER2 9.75GKGNPEVELLREKAAQIRAQLQAYRHN 945MGSWWEFRVRLEAIDYRLKALGGSEAELAAFEKEIAAFESELQAYK HER2 6.82GKGNPEVEYLRMKAATIRAILQAYRHN 946MGSWYEFDIRLEAIKYRLSALGGSEAELAAFEKEIAAFESELQAYK HER2 5.35GKGNPEVEYLRKKAAVIRSMLQAYRHN 947MGSWWEFRIRLEAIWYRLHALGGSEAELAAFEKEIAAFESELQAYK HER2 8.04GKGNPEVEDLRIFAANIRSKLQAYRHN 948MGSWWEFNVRLQAIKYRLSALGGSEAELAAFEKEIAAFESELQAYK HER2 5.23GKGNPEVEDLRKTAAHIRWQLQAYRHN 949MGSWWEFNVRLSAIRYRLLALGGSEAELAAFEKEIAAFESELQAYK HER2 6.73GKGNPEVEDLRASAAQIRAMLQAYRHN 950MGSWWEFNMRLSAIKYRLYALGGSEAELAAFEKEIAAFESELQAYK HER2 3.08GKGNPEVEILRRLAADIRERLQAYRHN

In some embodiments, the disclosure provides compositions comprising oneor more of the DD sequences disclosed on Table 1. In other embodiments,the disclosure provides compositions comprising one or more DDscomprising a sequence with 60-70%, 70-75%, 75-80%, 80-85%, 85-90%,95-99% homology (and overlapping ranges therein) with a sequencedisclosed in Table 1. In some embodiments, the DD(s) having suchhomology are functionally similar or identical as compared to therespective reference sequence in Table 1. In some embodiments, thedisclosure provides a polypeptide that comprises one or more DD thatcompete with (wholly or partially) one or more of the DD sequencesdisclosed in Table 1 (reference sequence) for its respective target. Theability of one polypeptpide to compete with a reference polypeptide forbinding to a respective target can routinely be determined using astandard competition assay known in the art. In some embodiments,competition does not require that the polypeptide competes for the sameepitope as a polypeptide (DD) of Table 1, rather the polypeptide cancompete by binding a sterically inhibiting epitope, an overlappingepitope, etc.

Affinity Maturation and De-Immunization of DD and DDpp

Affinity maturation strategies can be used to generate high affinity DDand DDpp that can be used in the DDpp fusion proteins described herein.An improved DD and DDpp that specifically binds a desired target (e.g.,BCAM, CD123, CS1, HER2, AFP, and AFP p26) can also be prepared based ona known DDpp reference sequence. For example, at least one, two, three,four, five, or more amino acid mutations (e.g., conservative ornon-conservative substitutions), deletions or insertions can beintroduced into a DD sequence disclosed in Table 1 (i.e., a referencesequence) and the resulting DDpp can be screened for binding to therespective target and biological activity, such as the ability toantagonize the biological activity of the respective target or agonizethe biological activity of the respective target.

The disclosed DDpp, particularly those administered to a subject, arepreferably not antigenic with respect to the subject (e.g., human). Insome embodiments, the sequence of the DDpp does not contain a humanHLA-DR binding motif or cleavage sites for proteasomes andimmune-proteasomes. In particular embodiments, the DDpp sequence doesnot contain an antigenic sequence as determined by a computer predictionmodel version existent on the filing date of this specification. Inparticular embodiments, the DDpp sequence does not contain an MHC (classI or class II) binding site sequence as predicted by an algorithmselected from ProPred (see, e.g., Singh, Bioinformatics 17(12):1236-1237 (2001)), ProPredl (Singh, Bioinformatics 19(8): 1009-14(2003)), SYFPEITHI (see, e.g., Schuler, Immunoinf. Meth. in Mol. Biol.409(1): 75-93 (2007)), SMM-align (see, e.g., Nielsen, BMC Bioinformatics8: 238 (2007)), RANKPEP (see, e.g., Reche, Hum Immunol 63: 701-709.(2004)), or TEPITOPE (see, Sturniolo, Nat Biotechnol 17: 555-561(1999)), wherein the version of the algorithm and the applied databaseare in existence on the filing date of this application. In someembodiments, the DDpp does not contain a sequence that sharescharacteristics with a high affinity (binding threshold less than 6%) Tcell epitope. (Singh, Bioinformatics 17: 1236-1237 (2001)). In someembodiments, the DDpp does not contain a sequence that sharescharacteristics with a promiscuous (present in greater than 50% ofrelevant alleles) T cell epitope (Singh, Bioinformatics 17: 1236-1237(2001)). In some embodiments, the DDpp does not contain a sequence thatshares characteristics with a high affinity or a promiscuous T cellepitope. In particular embodiments, the DDpp does not contain thesequence LAAIKTRLQ (SEQ ID NO: 2). Techniques for generating, screening,and identifying affinity matured DDpp variants and target-binding DDppvariants containing a sequence alteration that removes a predicted MHC(class I or class II) binding site sequence are known in the art.

Articles of Manufacture

Articles of manufacture, including, kits, are provided herein. Thearticle of manufacture may comprise a container and a label or packageinsert on or associated with the container. Suitable containers include,for example, bottles, vials or syringes. The containers may be formedfrom a variety of materials such as glass or plastic. The containerholds one or more DDpp, nucleic acids encoding DDpp and/or vectors orhost cells of the present disclosure. The label or package insert mayinclude directions for performing affinity based screening and/ordetection.

Also provided are kits containing a DDpp. Such kits have uses including,but not limited to detecting the target of interest to which the DDppspecifically binds (e.g., BCMA, CD123, CS1, HER2, AFP, or AFP p26)).Such assay kit may be useful in screening for the presence of a targetof interest and/or quantitating the concentrations of a target ofinterest in a fluid, such as, a biological fluid (e.g., blood, serum, orsynovial fluid).

In one embodiment a DDpp assay kit is contemplated which comprises oneor more containers of a DDpp that specifically binds a target ofinterest and, optionally, a detection means for determining the presenceor absence of a target/DDpp interaction or the absence thereof. The kitfurther optionally contains target of interest protein (e.g., BCMA,CD123, CS1, HER2, AFP, or AFP p26) that may be used, for example as acontrol or standard. The DDpp may be free or expressed on the surface ofa host cell or on the surface of a bacteriophage. In a specificembodiment, the DDpp or target of interest provided in the kit islabeled. Any label known in the art can be used. In some embodiments,the label is selected from the group consisting of biotin, a fluorogen,an enzyme, an epitope, a chromogen, or a radionuclide. In someembodiments, the DDpp is immobilized on a solid support. The detectionmeans employed to detect the label will depend on the nature of thelabel and can be any known in the art, e.g., film to detect aradionuclide; an enzyme substrate that gives rise to or amplifies adetectable signal to detect the presence of a target of interest.

Preferably, the kit further comprises a solid support for the DDpp,which may be provided as a separate element or on which a DDpp thatspecifically binds a target of interest (e.g., BCMA, CD123, CS1, HER2,AFP, or AFP p26) is immobilized. Hence, the DDpp that specifically bindsthe target of interest in the kit may be immobilized on a solid support,or they may be immobilized on such support that is included with the kitor provided separately from the kit. Preferably, DDpp is coated on amicrotiter plate. In some embodiments, the detection involves a signalamplifying molecule. Where the signal amplifying molecule is an enzyme,the kit optionally further includes substrates and cofactors required bythe enzyme, and where the amplifying molecule is a fluorophore. The kitoptionally further includes a dye precursor that provides the detectablechromophore.

The kit may also contain instructions for carrying out the assay as wellas other additives such as stabilizers, washing and incubation buffers,and the like. The components of the kit will be provided inpredetermined ratios, with the relative amounts of the various reagentssuitably varied to provide for concentrations in solution of thereagents that substantially maximize the sensitivity of the assay.Particularly, the reagents can be provided as dry powders, usuallylyophilized, including excipients, which on dissolution will provide fora reagent solution having the appropriate concentration for combiningwith the sample to be tested.

Various formats and techniques for binding assays that can be used areknown in the art and include but are not limited to, immobilization tofilters such as nylon or nitrocellulose; two-dimensional arrays, enzymelinked immunosorbent assay (ELISA), radioimmuno-assay (RIA), competitivebinding assays, direct and indirect sandwich assays, immunoprecipitationassays, fluorimetric microvolume assay technology (FMATTM), Luminex™system assays, fluorescent resonance energy transfer (FRET),bioluminescence resonance energy transfer (BRET), electroimmunoassays,AlphaScreen™, nanoparticle-derived techniques, and surface plasmonresonance (SPR).

Binding assays can be homogeneous or semi-homogeneous. A homogeneousassay is an assay where all the components are mixed together,incubated, and then analyzed. A semi-homogeneous assay is one where themajority of the reaction takes place as a complex mixture, but a washingstep is required prior to the addition of a final reagent and analysis,in contrast to a typical stepwise assembly sandwich assay where eachcomponent is added then washed off before the next component is added.In some embodiments, the assay is an immunoassay. In certainembodiments, the assay is a semi-homogeneous Enzyme Immuno-Assay (EIA).

Uses

DDpp, whether alone, as fusion proteins, as chemical conjugates or asother embodiments, described herein, have a variety of applications. Insome embodiments, DDpp are used as detection reagents, diagnosticreagents or analytical reagents. Some embodiments, have in vivo, invitro and/or ex vivo applications. Methods that employ the DDpp in vitrocan be performed in different formats, such as in microtiter plates, inprotein arrays, on biosensor surfaces, on tissue sections, and inadditional formats that would be apparent to a person skilled in theart. Likewise, methods that employ the DDpp in vivo can be used indifferent formats that include but are not limited to DDpp-Fc fusionproteins, CAR cells, and DDpp multi-specific antibodies. In particularembodiments, DDpp such as DDpp fusion proteins are used as a therapeuticagent.

Analytical and Diagnostic Applications

Whether alone, as fusion proteins, as chemical conjugates or as otherembodiments, described herein, DDpp have a variety of applications. Insome embodiments, DDpp are used as detection reagents of targets ofinterest in a variety of different sample types.

In one embodiment a DDpp are used to detect targets of interest insolutions involved in manufacturing processes, such as proteinexpression. Samples may include, but are not limited to, water, buffers,in-process purification samples, bulk drug substance and final drugproduct. In still additional embodiments, the DDpp can be used to detectcontaminants from a sample, such as a water supply source or water (orother fluid) used in manufacturing.

In another embodiment, DDpp are used to detect targets of interest indiagnostic samples. Samples may include, but are not limited to tissuehomogenates, cell extracts, biopsy samples, sera, plasma, lymph, blood,blood fractions, urine, synovial fluid, spinal fluid, saliva, mucous,sputum, pleural fluid, nipple aspirates, fluid of the respiratory,intestinal, and genitourinary tracts, tear fluid, breast milk, fluidfrom the lymphatic system, semen, cerebrospinal fluid, intra-organsystem fluid, ascitic fluid, tumor cyst fluid, aminotic fluid, and mediaor lysate from cultured cells.

In one embodiment, the DDpp are useful for detecting the presence of afactor or multiple factors (e.g., antigens or organisms) in a biologicalsample. The term “detecting” as used herein encompasses quantitative orqualitative detection. In certain embodiments, a biological samplecomprises a cell, tissue or fluid. In certain embodiments, such tissuesinclude normal and/or cancerous tissues.

Various formats and techniques for detection are known in the art andinclude but are not limited to Western Blot analysis,Immunohistochemistry, ELISA, FACS analysis, enzymatic assays,autoradiography and any of the binding assays mentioned herein.

In one embodiment, a method is provided for detecting a target ofinterest (e.g., BCMA, CD123, CS1, HER2, AFP, or AFP p26) in a solutioncontaining the target comprising: (a) contacting the solution with aDDpp that specifically binds the target of interest under conditionssuitable for specific binding of the DDpp to the target and (b)detecting binding of the DDpp and target. The DDpp may be either free orimmobilized. Sufficient time is allowed to permit binding between thetarget of interest and the DDpp, and non-binding components in thesolution or mixture are removed or washed away. The formation of abinding complex between the DDpp and the target of interest can then bedetected, for example, by detecting the signal from a label on the DDpp,which is one component of the binding complex. A label may be any labelthat generates a signal that can be detected by standard methods, suchas a fluorescent label, a radioactive compound, or an enzyme that reactswith a substrate to generate a detectable signal. Examples of suitablelabels for such purposes are described herein and/or otherwise known inthe art.

DDpp that bind to a target of interest such as BCMA, CD123, CS1, HER2,AFP, or AFP p26 can be detectably labeled through the use ofradioisotopes, affinity labels (such as biotin, avidin, etc.), enzymaticlabels (such as horseradish peroxidase, alkaline phosphatase, etc.)using methods known in the art, such as described in WO00/70023 and(Harlow and Lane (1989) Antibodies, Cold Spring Harbor Laboratory, pp.1-726).

The detectable marker or label can be any which is capable of producing,either directly or indirectly, a measurable signal, such as aradioactive, chromogenic, luminescence, or fluorescent signal, which canbe used to quantitate the amount of bound detectable moiety or label ina sample. Detectable labels known in the art include radioisotopes, suchas ³H, ⁴C, ³²P, ³⁵S, or ¹²⁵I, electrochemiluminescent labels (such asRuthenium (Ru)-based catalyst in conjunction with substrates, etc.),luminescent or bioluminescent labels (e.g., Europium, Vanadium),fluorescent or chemiluminescent compounds, such as fluoresceinisothiocyanate, rhodamine, or luciferin, enzymes (e.g., enzyme, such asalkaline phosphatase, beta-galactosidase, or horseradish peroxidase),colorimetric labels such as colloidal gold, colored glass or plasticbeads (e.g., polystyrene, polypropylene, latex, etc.), paramagneticatoms or magnetic agents, electron-dense reagents, a nano- or micro-beadcontaining a fluorescent dye, nanocrystals, a quantum dot, a quantumbead, a nanotag, dendrimers with a fluorescent label, amicro-transponder, an electron donor molecule or molecular structure, ora light reflecting particle, the microparticles may be nanocrystals orquantum dots. Nanocrystals are substances that absorb photons of light,then re-emit photons at a different wavelength (fluorophores). Inaddition, additional fluorescent labels, or secondary antibodies may beconjugated to the nanocrystals. Nanocrystals are commercially availablefrom sources such as Invitrogen and Evident Technologies (Troy, N.Y.).Other labels include E)-5-[2-(methoxycarbonyl) ethenyl]cytidine, whichis a nonfluorescent molecule that when subjected to ultraviolet (UV)irradiation yields a product, 3beta-D-ribofuranosyl-2,7-dioxopyrido[2,3-d]pyrimidine, which displays astrong fluorescence signal.

Competitive inhibition can be determined by any method known in the art,for example, competition ELISA assays. A DDpp, such as a DDpp fusionprotein (e.g., a DDpp-Fc, DDpp-CAR, a DDpp-scFv), or other molecule issaid to “competitively inhibit” binding of a reference molecule to agiven epitope if it binds to that epitope to the extent that it blocks,to some degree, binding of the reference molecule to the epitope. Asused herein, a DDpp (e.g., a DDpp fusion protein), or other molecule canbe said to competitively inhibit binding of the reference molecule to agiven epitope, for example, by at least 90%, at least 80%, at least 70%,at least 60%, at least 50%, by at least 40%, at least 30%, or at least20%. The terms “compete,” “ability to compete” and “competes with” arerelative terms used to describe a DDpp, such as a DDpp fusion protein,that produce at least 20%, at least 30%, at least 40%, or at least 50%inhibition of binding of a reference molecule to a target by a DDpp suchas a DDpp fusion protein (e.g., a DDpp-Fc, DDpp CAR, a DDpp-scFv, and anantibody-comprising a DDpp) as determined in a standard competitionassay as described herein or otherwise known in the art, including, butnot limited to, competitive assay systems using techniques such asradioimmunoassays (RIA), enzyme immunoassays (EIA), preferably theenzyme linked immunosorbent assay (ELISA), “sandwich” immunoassays,immunoradiometric assays, fluorescent immunoassays, luminescent,electrochemical luminescent, and immunoelectrophoresis assays. Methodsfor determining binding and affinity of candidate binding molecules areknown in the art and include, but are not limited to, affinitychromatography, size exclusion chromatography, equilibrium dialysis,fluorescent probe displacement, and plasma resonance.

Therapeutics

The DD described herein are useful in a variety of applicationsincluding, but not limited to, therapeutic treatment methods, which maybe in vitro, ex vivo, or in vivo methods.

The application as a therapeutic entity is an attribute of the targetbinding specificity of the DDpp. The incorporation of DDpp withinvarious molecular compositions, (e.g., a DD-antibody fusions, DD-drugconjugates and DD-chimeric receptors) affords application in a varietyof therapeutic indications and modalities, which include, but notlimited to soluble and cell-associated compositions.

In one embodiment, the DDpp is a soluble fusion protein made up of anoptional epitope tag 10 and a targeting domain that binds to a targetthat is associated with a disease or disorder of the metabolic,cardiovascular, musculoskeletal, neurological, or skeletal system. Inother embodiments, the DDpp is a soluble fusion protein that binds to atarget that is associated with yeast, fungal, viral or bacterialinfection or disease. In some embodiments, the DDpp is a soluble fusionprotein that binds to a target that is associated with a disease ordisorder of the immune system.

Also provided are therapeutic compositions useful for practicingtherapeutic methods described herein. In one embodiment, therapeuticcompositions provided herein contain a physiologically tolerable carriertogether with at least one species of DDpp fusion as described herein,dissolved or dispersed therein as an active ingredient. In anotherembodiment, therapeutic compositions provided herein contain aphysiologically tolerable carrier together with at least one species ofa DDpp as described herein, dissolved or dispersed therein as an activeingredient. In a preferred embodiment, therapeutic composition is notimmunogenic when administered to a human patient for therapeuticpurposes.

The preparation of a pharmacological composition that contains activeingredients dissolved or dispersed therein is well understood in theart. Typically such compositions are prepared as sterile injectableseither as liquid solutions or suspensions, aqueous or non-aqueous.However, solid forms suitable for solution, or suspensions, in liquidprior to use can also be prepared. The preparation can also beemulsified. Thus, a DDpp-containing composition can take the form ofsolutions, suspensions, tablets, capsules, sustained releaseformulations or powders, or other compositional forms. In someembodiments, the DDpp compositions (e.g., a DDpp fusion proteins) areformulated to ensure or optimize distribution in vivo, For example, theblood-brain barrier (BBB) excludes many highly hydrophilic compounds andif so desired, the compositions are prepared so as to increase transferacross the BBB, by for example, formulation in liposomes. For methods ofmanufacturing liposomes, see, e.g., U.S. Pat. Nos. 4,522,811, 5,374,548,and 5,399,331. The liposomes can comprise one or more moieties that areselectively transported into specific cells or organs, thus enhancetargeted drug delivery (see, e.g., Ranade, Clin. Pharmacol. 29: 685(1989)).

The DDpp (e.g. DDpp fusion protein) can be mixed other activeingredients and/or excipients that are pharmaceutically acceptable andcompatible with the active ingredient and in amounts suitable for use intherapeutic methods described herein. Suitable excipients are, forexample, water, saline, dextrose, glycerol, ethanol or the like andcombinations thereof. In addition, if desired, the composition cancontain minor amounts of auxiliary substances such as wetting oremulsifying agents, pH buffering agents and the like which enhance theeffectiveness of the active ingredient.

Therapeutic DDpp can include pharmaceutically acceptable salts of thecomponents therein. Pharmaceutically acceptable salts include the acidaddition salts (formed with the free amino groups of the polypeptide)that are formed with inorganic acids such as, for example, hydrochloricor phosphoric acids, or such organic acids as acetic, tartaric, mandelicand the like. Salts formed with the free carboxyl groups can also bederived from inorganic bases such as, for example, sodium, potassium,ammonium, calcium or ferric hydroxides, and such organic bases asisopropylamine, trimethylarnine, 2-ethylamino ethanol, histidine,procaine and the like.

Physiologically tolerable carriers are known in the art. Exemplary ofliquid carriers are sterile aqueous solutions that contain no materialsin addition to the active ingredients and water, or contain a buffersuch as sodium phosphate at physiological pH value, physiological salineor both, such as phosphate-buffered saline. Still further, aqueouscarriers can contain more than one buffer salt, as well as salts such assodium and potassium chlorides, dextrose, propylene glycol, polyethyleneglycol, and other solutes.

Liquid compositions can also contain liquid phases in addition to, andto the exclusion of water. Exemplary of such additional liquid phasesare glycerin, vegetable oils such as cottonseed oil, organic esters suchas ethyl oleate, and water-oil emulsions.

In one embodiment, a therapeutic composition contains a DDpp fusionprotein, typically in an amount of at least 0.1 weight percent of DDppfusion protein per weight of total therapeutic composition. A weightpercent is a ratio by weight of DDpp fusion per total composition. Thus,for example, 0.1 weight percent is 0.1 grams of DDpp per 100 grams oftotal composition.

A DDpp fusion protein-containing therapeutic composition typicallycontains about 10 micrograms (μg) per milliliter (ml) to about 100milligrams (mg) per ml of DDpp fusion protein as active ingredient pervolume of composition, and more preferably contains about 1 mg/ml toabout 10 mg/ml (i.e., about 0.1 to 1 weight percent).

The dosage ranges for the administration of the DDpp (e.g., a DDppfusion protein) are those large enough to produce the desired effect inwhich the disease symptoms mediated by the target molecule areameliorated. The dosage should not be so large as to cause adverse sideeffects, such as hyperviscosity syndromes, pulmonary edema, congestiveheart failure, and the like. Generally, the dosage will vary with theage, condition, sex and extent of the disease in the patient and can bedetermined by one of skill in the art. The dosage can be adjusted by theindividual physician in the event of any complication.

The DDpp (e.g., a DDpp fusion protein) can be administered parenterallyby injection or by gradual infusion over time. Although the targetmolecule can typically be accessed in the body by systemicadministration and therefore most often treated by intravenousadministration of therapeutic compositions, other tissues and deliverymeans are contemplated where there is a likelihood that the tissuetargeted contains the target molecule. Thus, DDpp can be administeredintravenously, intraperitoneally, intramuscularly, subcutaneously,intracavity, transdermally, and can be delivered by peristaltic means.DDpp fusion proteins can also be delivered by aerosol to airways andlungs.

Therapeutic compositions containing a DDpp can be conventionallyadministered intravenously, as by injection of a unit dose, for example.The term “unit dose” when used in reference to a therapeutic compositionprovided herein refers to physically discrete units suitable as unitarydosage for the subject, each unit containing a predetermined quantity ofactive material calculated to produce the desired therapeutic effect inassociation with the required diluent; e.g., carrier, or vehicle. Insome embodiments, therapeutic compositions containing a DDpp areadministered subcutaneously.

The DDpp (e.g., a DDpp fusion protein) are administered in a mannercompatible with the dosage formulation, and in a therapeuticallyeffective amount. The quantity to be administered depends on the subjectto be treated, capacity of the subject's system to utilize the activeingredient of the administered composition, and degree of therapeuticeffect desired. Precise amounts of active ingredient required to beadministered depend on the judgment of the practitioner and are peculiarto each individual. However, suitable dosage ranges for systemicapplication are disclosed herein and depend on the route ofadministration. Suitable regimes for administration are also variable,but are typified by an initial administration followed by repeated dosesat one or more hour intervals by a subsequent injection or otheradministration. Alternatively, continuous intravenous infusionsufficient to maintain concentrations in the blood in the rangesspecified for in vivo therapies are contemplated.

The DDpp compositions are formulated, dosed, and administered in afashion consistent with good medical practice. Factors for considerationin this context include the particular disorder being treated, theparticular mammal being treated, the clinical condition of theindividual patient, the cause of the disorder, the site of delivery ofthe agent, the method of administration, the scheduling ofadministration, and other factors known to medical practitioners. Thedosage ranges for the administration of the DDpp are those large enoughto produce the desired effect in which the disease symptoms mediated bythe target molecule are ameliorated. The dosage should not be so largeas to cause adverse side effects, such as, hyperviscosity syndromes,pulmonary edema, congestive heart failure, and the like. Generally, thedosage will vary with the age, condition, sex and extent of the diseasein the patient and can be determined by one of skill in the art. Thedosage can be adjusted by the individual physician in the event of anycomplication.

The dosage schedule and amounts effective for therapeutic andprophylactic uses, i.e., the “dosing regimen,” will depend upon avariety of factors, including the cause, stage and severity of thedisease or disorder, the health, physical status, age of the mammalbeing treated, and the site and mode of the delivery of the DD.Therapeutic efficacy and toxicity of the complex and formation can bedetermined by standard pharmaceutical, pharmacological, andtoxicological procedures in cell cultures or experimental animals. Dataobtained from these procedures can likewise be used in formulating arange of dosages for human use. Moreover, therapeutic index (i.e., thedose therapeutically effective in 50 percent of the population dividedby the dose lethal to 50 percent of the population (ED50/LD50)) canreadily be determined using known procedures. The dosage is preferablywithin a range of concentrations that includes the ED50 with littletoxicity or none dose limiting toxicity, and may vary within this rangedepending on the dosage form employed, sensitivity of the patient, andthe route of administration.

The dosage regimen also takes into consideration pharmacokineticsparameters known in the art, such as, drug absorption rate,bioavailability, metabolism and clearance (see, e.g., Hidalgo-Aragones,J. Steroid Biochem. Mol. Biol. 58: 611-617 (1996); Groning et al.,Pharmazie 51: 337-341 (1996); Fotherby, Contraception 54: 59-69 (1996);and Johnson et al., J. Pharm. Sci. 84: 1144-1146 (1995)). It is wellwithin the state and level of skill of the clinician to determine thedosage regimen for each subject being treated. Moreover, single ormultiple administrations of DDpp compositions can be administereddepending on the dosage and frequency as required and tolerated by thesubject. The duration of prophylactic and therapeutic treatment willvary depending on the particular disease or condition being treated.Some diseases are amenable to acute treatment whereas others requirelong-term, chronic therapy. DDpp can be administered serially, orsimultaneously with the additional therapeutic agent.

In some embodiments, the DDpp is administered at about 1 mg/kg to about50 mg/kg, about 1 mg/kg to about 25 mg/kg, about 1 mg/kg to about 20mg/kg, about 1 mg/kg to about 15 mg/kg, about 1 mg/kg to about 10 mg/kg,or about 1 mg/kg to about 5 mg/kg.

In another embodiment, the DDpp is administered in combination with oneor more additional therapeutics.

A therapeutically effective amount of the DDpp (e.g., a DDpp fusionprotein) can be an amount such that when administered in aphysiologically tolerable composition is sufficient to achieve a plasmaconcentration of from about 0.1 microgram (μg) per milliliter (ml) toabout 100 μg/ml, preferably from about 1 μg/ml to about 5 μg/ml, andusually about 5 μg/ml. Stated differently, the dosage can vary fromabout 0.1 mg/kg to about 300 mg/kg, preferably from about 0.2 mg/kg toabout 200 mg/kg, most preferably from about 0.5 mg/kg to about 20 mg/kg,in one or more dose administrations daily, for one or several days.

In some embodiments, the DDpp described herein are useful for treating adisease or disorder of the immune system, such as inflammation or anautoimmune disease.

In some embodiments, the DDpp described herein are useful for treatingcancer. Thus, in some embodiments, the disclosure provides a method oftreating cancer that comprises administering a therapeutically effectiveamount of a DDpp (e.g. a DDpp fusion) to a patient.

In additional embodiments, the disclosure provides a chimeric antigenreceptor (CAR), wherein the CAR includes a targeting domain, atransmembrane domain, and an intracellular signaling domain. In someembodiments, the targeting domain is made up of, at least in part, atarget-binding DDpp disclosed herein.

The disclosure also provides cells comprising a nucleic acid sequenceencoding a CAR, wherein the CAR comprises an antigen binding domain madeup of, at least in part, a disclosed polypeptide that binds a target ofinterest (e.g., BCMA, CD123, CS1, HER2, AFP, and AFP p26), atransmembrane domain, and a signaling domain. In some embodiments, theCAR binds specifically to a tumor antigen (and thus functions to deliverthe cell expressing the CAR to the tumor. In some embodiments, the tumorantigen is associated with a hematologic malignancy. In someembodiments, the tumor antigen is BCMA. In some embodiments, the tumorantigen is CD123. In some embodiments, the tumor antigen is CS1. Inadditional embodiments, tumor antigen is associated with a solid tumor.In some embodiments, the tumor antigen is HER2. In some embodiments,both solid and hematologic tumors are targeted. In some embodiments, thecell expressing the CAR is a T cell, a natural killer (NK) cell or otherimmune cell type. In some embodiments, the cell expressing the CAR(whether T cell, NK cell or other cell type) exhibits an anti-tumorimmunity when the polypeptide binds to its corresponding tumor antigen.

In some embodiments, the disclosure provides a method of treating asubject having cancer, comprising administering to the subject atherapeutically effective amount of a CAR immune cell comprising achimeric antigen receptor (CAR), wherein the CAR comprises a targetbinding domain that comprises a DD that specifically binds BCMA (e.g.,comprising an amino acid sequence selected from the group consisting ofSEQ ID NO: 11-305, and 306), a transmembrane domain, and anintracellular domain (comprising a signaling domain). In someembodiments, the administered CAR immune cell is a T cell. In someembodiments, the administered CAR immune cell is a NK cell. In someembodiments, the administered CAR immune cell is not a T cell or an NKcell. In further embodiments, a combination of different CAR immune celltypes (e.g., NK cells and T cells) is administered to the subject.

In some embodiments, the target binding domain of the administered CARimmune cell specifically binds BCMA expressed by a cancer cell of thesubject, and induces the CAR immune cell to generate a cytotoxic signalthat results in cytotoxic effects on the cancer cell, thereby treatingthe cancer.

In some embodiments, the disclosure provides a method of treating asubject having cancer, comprising administering to the subject atherapeutically effective amount of a CAR immune cell comprising achimeric antigen receptor (CAR), wherein the CAR comprises a targetbinding domain that comprises a DD that specifically binds CD123 (e.g.,comprising an amino acid sequence selected from the group consisting ofSEQ ID NO: 307-739, and 740), a transmembrane domain, and anintracellular domain (comprising a signaling domain). In someembodiments, the administered CAR immune cell is a T cell. In someembodiments, the administered CAR immune cell is a NK cell. In someembodiments, the administered CAR immune cell is not a T cell or an NKcell. In further embodiments, a combination of different CAR immune celltypes (e.g., NK cells and T cells) is administered to the subject. Insome embodiments, the target binding domain of the administered CARimmune cell specifically binds CD123 expressed by a cancer cell of thesubject, and induces the CAR immune cell to generate a cytotoxic signalthat results in cytotoxic effects on the cancer cell, thereby treatingthe cancer.

In some embodiments, the disclosure provides a method of treating asubject having cancer, comprising administering to the subject atherapeutically effective amount of a CAR immune cell comprising achimeric antigen receptor (CAR), wherein the CAR comprises a targetbinding domain that comprises a DD that specifically binds CS1 (e.g.,comprising an amino acid sequence selected from the group consisting ofSEQ ID NO: 896-909, and 910), a transmembrane domain, and anintracellular domain (comprising a signaling domain). In someembodiments, the administered CAR immune cell is a T cell. In someembodiments, the administered CAR immune cell is a NK cell. In someembodiments, the administered CAR immune cell is not a T cell or an NKcell. In further embodiments, a combination of different CAR immune celltypes (e.g., NK cells and T cells) is administered to the subject. Insome embodiments, the target binding domain of the administered CARimmune cell specifically binds CS1 expressed by a cancer cell of thesubject, and induces the CAR immune cell to generate a cytotoxic signalthat results in cytotoxic effects on the cancer cell, thereby treatingthe cancer.

In some embodiments, the disclosure provides a method of treating asubject having cancer, comprising administering to the subject atherapeutically effective amount of a CAR immune cell comprising achimeric antigen receptor (CAR), wherein the CAR comprises a targetbinding domain that comprises a DD that specifically binds HER2 (e.g.,comprising an amino acid sequence selected from the group consisting ofSEQ ID NO: 911-949, and 950), a transmembrane domain, and anintracellular domain (comprising a signaling domain). In someembodiments, the administered CAR immune cell is a T cell. In someembodiments, the administered CAR immune cell is a NK cell. In someembodiments, the administered CAR immune cell is not a T cell or an NKcell. In further embodiments, a combination of different CAR immune celltypes (e.g., NK cells and T cells) is administered to the subject. Insome embodiments, the target binding domain of the administered CARimmune cell specifically binds HER2 expressed by a cancer cell of thesubject, and induces the CAR immune cell to generate a cytotoxic signalthat results in cytotoxic effects on the cancer cell, thereby treatingthe cancer.

Additionally provided are methods for treating or preventing cancercomprising administering a DDpp-CAR T lymphocyte to a patientpredisposed to or having a cancer that expresses a tumor antigen on thesurface of target cells, and wherein the DDpp specifically binds theantigen.

In some embodiments, wherein CAR T cells are administered to the subjecthaving cancer, the binding of the target of interest (e.g., BCMA, CD123,CS1, HER2, AFP, or AFP p26) stimulates the CAR T cell to initiateintracellular signaling. In further embodiments, the binding of the CART cell to the target of interest stimulates the T cell to initiateintracellular signaling and produce cytokines. In further embodiments,the binding of the CAR T cell to the target of interest stimulates the Tcell to initiate intracellular signaling, produce cytokines, anddegranulate, leading to the cytotoxic effects on the cancer cell. Insome embodiments, the CAR T cell proliferates in response to binding thetarget of interest. Advantageously, in some embodiments, the activity ofthe CAR T cell does not result in the T cell exhibiting a phenotypeassociated with T cell exhaustion. In some embodiments, thetransmembrane domain of the CAR T cell comprises 41BB or CD28, and thecytoplasmic domain comprises an alpha, beta, or zeta chain of the T cellreceptor.

In some embodiments, the administered CAR further comprises 2, 3, 4, 5,or more than 5, DD and/or other binding domains (e.g., scFv) thatspecifically bind the target of interest (e.g., BCMA, CD123, CS1, HER2,AFP, or AFP p26) expressed by the cancer cell. In additionalembodiments, the administered CAR further comprises 2, 3, 4, 5, or morethan 5, DD or other binding domains (e.g., scFv) that specifically bindsa different target of interest expressed by the cancer cell. Inadditional embodiments, the administered CAR further comprises 2, 3, 4,5, or more than 5, DD or other binding domains (e.g., scFv) thatspecifically binds a different target of interest expressed by adifferent cancer cell or a vascular endothelial cell.

In some embodiments, the administered immune cell further comprises asecond CAR polypeptide having a DD or other binding domain (e.g., scFv)that specifically binds a second target of interest expressed by thecancer cell. In some embodiments, the administerd immune cell furthercomprises a second CAR polypeptide having a DD or other binding domain(e.g., scFv) that specifically binds a second target of interestexpressed by a different cancer cell or a vascular endothelial cell.

In some embodiments, the administration of the immune cells with a CARis intravenous. In other embodiments, the immune cells with a CAR isadministered through an intra-arterial, intramuscular, local, or otheracceptable route for the given treatment scenario.

In some embodiments, the disclosure also provides methods of treating asubject having cancer, comprising, administering to the subject animmune cell comprising a chimeric antigen receptor (CAR), wherein theCAR comprises a target binding domain, wherein the target binding domaincomprises a polypeptide having an amino acid sequence selected from thegroup consisting of SEQ ID NO: 11-305, and 306; SEQ ID NO: 307-739, and740; SEQ ID NO: 741-874 and 886-895; SEQ ID NO: 896-909 and 910; or SEQID NO: 911-949, and 950; wherein the polypeptide specifically binds atarget of interest (e.g., BCMA, CD123, CS1, HER2, AFP, or AFP p26)expressed by a cancer cell.

In additional embodiments, the disclosure provides a method of treatinga subject having cancer, the method comprising intravenouslyadministering to the subject an immune cell comprising a chimericantigen receptor (CAR) expressed on a T cell, wherein the CAR comprisesa target binding domain comprising a polypeptide having an amino acidsequence selected from the group consisting of SEQ ID NO: 11-305, and306; SEQ ID NO: 307-739, and 740; SEQ ID NO: 741-874 and 886-895; SEQ IDNO: 896-909 and 910; or SEQ ID NO: 911-949, and 950; a transmembranedomain selected from 41BB and CD28, and an intracellular domain, whereinthe intracellular domain comprises a signaling domain selected from analpha, beta, or zeta chain of the T cell receptor, wherein, uponadministration to a subject having cancer, the target binding domainspecifically binds to the target of interest (e.g., BCMA, CD123, CS1,HER2, AFP, or AFP p26) expressed by a cancer cell, and wherein thebinding of the target of interest induces the CAR T cell to generatecytotoxic signals that result in cytotoxic effects on the cancer cell.In some embodiments, the cytotoxic effects result from degranulation ofthe CAR T cells. Advantageously, in some embodiments, the activation andcytotoxic activity of the CAR T cells is not associated with the CAR Tcells exhibiting a phenotype associated with T cell exhaustion. In someembodiments, the CAR optionally further comprises a second targetbinding domain comprising a second polypeptide having a different targetthan the target binding domain. In still further embodiments, additionaltargeting domains can optionally be included to enhance binding capacityto a marker, or impart binding specificity to other markers.

In some embodiments, the disclosure provides for the use of an immunecell comprising a chimeric antigen receptor (CAR) for the treatment ofcancer, wherein the CAR comprises a target binding domain comprising anamino acid sequence selected from the group consisting of SEQ ID NO:11-305, and 306; SEQ ID NO: 307-739, and 740; SEQ ID NO: 741-874 and886-895; SEQ ID NO: 896-909 and 910; or SEQ ID NO: 911-949, and 950; atransmembrane domain selected from 41BB and CD28, and an intracellulardomain, wherein the intracellular domain comprises a signaling domainselected from an alpha, beta, or zeta chain of the T cell receptor,wherein, upon administration to a subject having cancer, the targetbinding domain specifically binds to the target of interest (e.g., BCMA,CD123, CS1, HER2, AFP, or AFP p26) expressed by a cancer cell, andwherein the binding of the target of interest induces the immune cell togenerate cytotoxic signals that result in cytotoxic effects on thecancer cell. In different embodiments, the immune cells can be a T cellor a natural killer (NK) cell.

Cancers that can be treated include tumors that are not vascularized, ornot yet substantially vascularized, as well as vascularized tumors. Thecancers can comprise non-solid tumors (such as hematological tumors, forexample, leukemias and lymphomas) or can comprise solid tumors. Types ofcancers to be treated with the DDpp include, but are not limited to,carcinoma, blastoma, and sarcoma, and certain leukemia or lymphoidmalignancies, benign and malignant tumors, and malignancies e.g.,sarcomas, carcinomas, and melanomas. Adult tumors/cancers and pediatrictumors/cancers are also included.

In some embodiments, the DDpp described herein are useful for treating apatient having hematological cancers. Examples of hematological (orhematogenous) cancers include leukemias, including acute leukemias (suchas acute lymphocytic leukemia, acute myelocytic leukemia, acutemyelogenous leukemia and myeloblasts, promyeiocytic, myelomonocytic,monocytic and erythroleukemia), chronic leukemias (such as chronicmyelocytic (granulocytic) leukemia, chronic myelogenous leukemia, andchronic lymphocytic leukemia), polycythemia vera, lymphoma, Hodgkin'sdisease, non-Hodgkin's lymphoma (indolent and high grade forms),multiple myeloma, Waldenstrom's macroglobulinemia, heavy chain disease,myelodysplastic syndrome, hairy cell leukemia and myelodysplasia. Insome embodiments, the hematological cancer is multiple myeloma.

Examples of solid tumors, such as sarcomas and carcinomas, includefibrosarcoma, myxosarcoma, liposarcoma, chondrosarcoma, osteosarcoma,and other sarcomas, synovioma, mesothelioma, Ewing's tumor,leiomyosarcoma, rhabdomyosarcoma, colon carcinoma, lymphoid malignancy,pancreatic cancer, breast cancer, lung cancers, ovarian cancer, prostatecancer, hepatocellular carcinoma, squamous cell carcinoma, basal cellcarcinoma, adenocarcinoma, sweat gland carcinoma, medullary thyroidcarcinoma, papillary thyroid carcinoma, pheochromocytomas sebaceousgland carcinoma, papillary carcinoma, papillary adenocarcinomas,medullary carcinoma, bronchogenic carcinoma, renal cell carcinoma,hepatoma, bile duct carcinoma, choriocarcinoma, Wilms' tumor, cervicalcancer, testicular tumor, seminoma, bladder carcinoma, melanoma, and CNStumors (such as a glioma (such as brainstem glioma and mixed gliomas),glioblastoma (also known as glioblastoma multiforme) astrocytoma, CNSlymphoma, germinoma, medulloblastoma, Schwannoma craniopharyogioma,ependymoma, pineaioma, hemangioblastoma, acoustic neuroma,oligodendroglioma, menangioma, neuroblastoma, retinoblastoma and brainmetastases). In some embodiemnts, the cancer is breast cancer or ovariancancer.

In additional embodiments, the DDpp fusion protein binds (1) a target ona cell or tissue of interest (e.g., a tumor antigen on a tumor cell) and(2) a target on an effector cell, such as, a T cell receptor molecule.According to one embodiment, the binding of one or more targets by theDDpp fusion protein is used to direct an immune response to aninfectious agent, cell, tissue, or other location of interest in apatient. For example, in some embodiments, the DDpp fusion proteinspecifically binds a target on the surface of an effector cell. Thus, insome embodiments, the DDpp fusion protein specifically binds a target onthe surface of a T cell. In specific embodiments, the DDpp fusionprotein specifically binds CD3. In other embodiments, the DDpp fusionprotein specifically binds CD2. In a further embodiment, the DDpp fusionprotein specifically binds the T cell receptor (TCR). According toadditional embodiments, the DDpp fusion protein specifically binds atarget on the surface of a Natural Killer Cell. Thus, in someembodiments, the DDpp fusion protein specifically binds a NKG2D (NaturalKiller Group 2D) receptor. In additional embodiments, the DDpp fusionprotein specifically binds CD16 (i.e., Fc gamma RIII) CD64 (i.e., Fcgamma RI), or CD32 (i.e., Fc gamma RII).

In one embodiment, a DDpp fusion protein binds a target on a leukocyteand a tumor antigen on a tumor cell. In some embodiments, the DDppfusion protein binds NKG2D. In a further embodiment, a DDpp fusionprotein binds NKG2D and a target selected from ErbB2, EGFR, IGF1R, CD19,CD20, CD80 and EPCAM. In one embodiment, a DDpp fusion protein bindsCD3. In particular embodiments, the DDpp specifically binds CD3 epsilon.In one embodiment, a DDpp fusion protein binds CD4.

DDpp Drug Conjugates

In a further embodiment a DDpp fusion protein may be linked to otherorganic or inorganic molecules or substrates through the use ofchemically conjugation. In one embodiment, DDpp-drug conjugates areintended to facilitate the local delivery of cytotoxic agents throughthe targeting specificity of the DDpp. This combination of targetingspecificity and cytotoxic agent, allows targeted delivery of the drug totumors, and intracellular accumulation therein, where systemicadministration of these unconjugated drug agents may result inunacceptable levels of toxicity to normal cells as well as the tumorcells sought to be eliminated (Baldwin et al., Lancet pages 603-605(1986); Thorpe, “Antibody Carriers Of Cytotoxic agents In CancerTherapy: A Review,” in Monoclonal Antibodies '84: Biological AndClinical Applications, A. Pinchera et al., (ed.s), pp. 475-506 (1985)).

Cytotoxic agents include chemotherapeutic agents, growth inhibitoryagents, toxins (e.g., an enzymatically active toxin of bacterial,fungal, plant, or animal origin, or fragments thereof), radioactiveisotopes (i.e., a radioconjugate), etc. Chemotherapeutic agents usefulin the generation of such immunoconjugates include, for example,methotrexate, adriamicin, doxorubicin, melphalan, mitomycin C,chlorambucil, daunorubicin or other intercalating agents.Chemotherapeutic agents useful in the generation of suchimmunoconjugates also include antitubulin drugs, such as auristatins,including monomethyl auristatin E (MMAE) and monomethyl auristatin F(MMAF). Enzymatically active toxins and fragments thereof that can beused according to the disclosed methods include diphtheria A chain,nonbinding active fragments of diphtheria toxin, exotoxin A chain, ricinA chain, abrin A chain, modeccin A chain, alpha-sarcin, Aleurites fordiiproteins, dianthin proteins, Phytolaca americana proteins (PAPI, PAPII,and PAP-S), Momordica charantia inhibitor, curcin, crotin, Sapaonariaofficinalis inhibitor, gelonin, mitogellin, restrictocin, phenomycin,enomycin, and the tricothecenes.

In one embodiment, a DDpp (e.g., a DDpp fusion protein) is conjugated toa radioisotope. In a further embodiment, a DDpp is conjugated to anisotope selected from ⁹⁰Y, ¹²⁵I, ¹³¹I, ¹²³I, ¹¹¹In, ¹⁰⁵Rh, ¹⁵³Sm, ⁶⁷CU,⁶⁷Ga, ¹⁶⁶Ho, ¹⁷⁷Lu, ¹⁸⁶Re and ¹⁸⁸Re using anyone of a number of knownchelators or direct labeling. In other embodiments, the DDpp is coupledto drugs, prodrugs or lymphokines such as interferon. Conjugates of theDDpp and cytotoxin can routinely be made using a variety of bifunctionalprotein-coupling agents such as N-succinimidyl-3-(2-pyridyidithiol)propionate (SPDP), iminothiolane (IT), bifunctional derivatives ofimidoesters (such as dimethyl adipimidate HCL), active esters (such asdisuccinimidyl suberate), aldehydes (such as glutaraldehyde), bis-azidocompounds (such as bis(p-azidobenzoyl) hexanediamine), bis-diazoniumderivatives (such as bis-(p-diazo-niumbenzoyl)-ethylenediamine),diisocyanates (such as tolyene 2,6-diisocyanate), and bis-activefluorine compounds (such as 1,5-difluoro-2,4-dinitrobenzene). In aspecific embodiment, the toxin is conjugated to a DDpp fusion proteinthrough an enzyme-cleavable linker system (e.g., such as that present inSGN-35). Conjugates of a DDpp and one or more small molecule toxins,such as a calicheamicin, maytansinoids, a trichothene, and CC1065, andthe derivatives of these toxins that have toxin activity, can also beused.

In some embodiments, the cytotoxic agent is covalently attached to aDDpp by a linker. In some embodiments, the linker attaching the DDpp andthe cytotoxic agent is cleavable by a protease.

Therapeutic Use as Cell Associated Receptor

In one embodiment, the disclosed DDpp-CARs are used for the purpose ofredirecting transduced T cells to a tumor target defined by the bindingspecificity of the DDpp-CAR. In one embodiment, primary T cells aretransduced with a lentiviral vector encoding a CAR that combines a DDtarget binding domain with a transmembrane domain and an intracellulardomain of CD3-zeta, CD28, 41BB. The resultant population of transduced Tcells may therefore elicit a DDpp-CAR-mediated T cell response. In someembodiments, T cells are genetically modified to express DDpp-CAR andthe DDpp-CAR T cell is infused to a recipient in need thereof. Infurther embodiments, the infused cell is able to kill tumor cells in therecipient. Particularly advantageous properties of DDpp-CARs includeone, several or all of the following benefits: (i) target-bindingspecificity, (ii) enhanced therapeutic efficacy, (iii) reducedoff-target side effects, (iv) customizability for markers of aparticular patient or patient population, (v) enhanced stability duringproduction and processing, and (vi) ability to target one, two, or morespecific targets to enhance target-directed therapy.

“Genetically modified cells”, “redirected cells”, “geneticallyengineered cells” or “modified cells” as used herein refer to cells thatexpress a DDpp provided herein. In a particular embodiment, thegenetically modified cells express a DDpp fusion protein such as aDDpp-CAR. In a further embodiment, the genetically modified cellsexpress and display a DDpp-CAR on the cell surface.

“Disease targeted by genetically modified cells” as used hereinencompasses the targeting of any cell involved in any manner in anydisease by the genetically modified cells, irrespective of whether thegenetically modified cells target diseased cells or healthy cells toeffectuate a therapeutically beneficial result. The genetically modifiedcells include but are not limited to genetically modified T cells, NKcells, hematopoietic stem cells, pluripotent embryonic stem cells orembryonic stem cells. The genetically modified cells express theDDpp-CAR, which can target any of the antigens expressed on the surfaceof target cells.

In one embodiment, the DDpp portion of the DDpp-CAR is designed to treata particular cancer. Cancers that can be treated include tumors that arenot vascularized, or not yet substantially vascularized, as well asvascularized tumors. The cancers can comprise non-solid tumors (such ashematological tumors, for example, leukemias and lymphomas) or cancomprise solid tumors. Types of cancers to be treated with the DDpp-CARsinclude, but are not limited to, carcinoma, blastoma, and sarcoma, andcertain leukemia or lymphoid malignancies, benign and malignant tumors,and malignancies e.g., sarcomas, carcinomas, and melanomas. Adulttumors/cancers and pediatric tumors/cancers are also included.

Examples of hematological (or hematogenous) cancers include leukemias,including acute leukemias (such as acute lymphocytic leukemia, acutemyelocytic leukemia, acute myelogenous leukemia and myeloblasts,promyelocytic, myelomonocytic, monocytic and erythroleukemia), chronicleukemias (such as chronic myelocytic (granulocytic) leukemia, chronicmyelogenous leukemia, and chronic lymphocytic leukemia), polycythemiavera, lymphoma, Hodgkin's disease, non-Hodgkin's lymphoma (indolent andhigh grade forms), multiple myeloma, Waldenstrom's macroglobulinemia,heavy chain disease, myelodysplastic syndrome, hairy cell leukemia andmyelodysplasia.

Examples of solid tumors, such as sarcomas and carcinomas, includefibrosarcoma, myxosarcoma, liposarcoma, chondrosarcoma, osteosarcoma,and other sarcomas, synovioma, mesothelioma, Ewing's tumor,leiomyosarcoma, rhabdomyosarcoma, colon carcinoma, lymphoid malignancy,pancreatic cancer, breast cancer, lung cancers, ovarian cancer, prostatecancer, hepatocellular carcinoma, squamous cell carcinoma, basal cellcarcinoma, adenocarcinoma, sweat gland carcinoma, medullary thyroidcarcinoma, papillary thyroid carcinoma, pheochromocytomas sebaceousgland carcinoma, papillary carcinoma, papillary adenocarcinomas,medullary carcinoma, bronchogenic carcinoma, renal cell carcinoma,hepatoma, bile duct carcinoma, choriocarcinoma, Wilms' tumor, cervicalcancer, testicular tumor, seminoma, bladder carcinoma, melanoma, and CNStumors (such as a glioma (such as brainstem glioma and mixed gliomas),glioblastoma (also known as glioblastoma multiforme) astrocytoma, CNSlymphoma, germinoma, medulloblastoma, Schwannoma craniopharyogioma,ependymoma, pineaioma, hemangioblastoma, acoustic neuroma,oligodendroglioma, menangioma, neuroblastoma, retinoblastoma and brainmetastases).

In one embodiment, cancers and disorders can be treated using cellexpressing DDpp-CAR that target BCMA, CD123, CS1, HER2, AFP, or AFP p26.In one specific embodiment, the DD-CAR can be designed to target CD22 totreat B cell lymphoma. In another embodiment the cell expressingDDpp-CAR contain a DDpp designed to target CD19 can be used to treatcancers and disorders including but are not limited to pre-B ALL(pediatric indication), adult ALL, mantle cell lymphoma, diffuse largeB-cell lymphoma, salvage post allogenic bone marrow transplantation, andthe like. In another embodiment the cell expressing DDpp-CAR contain aDDpp designed to target CS1 can be used to treat multiple myeloma. Inanother embodiment the cell expressing DDpp-CAR contain a DDpp designedto target BCMA can be used to treat multiple myeloma. In anotherembodiment the cell expressing DDpp-CAR contain a DDpp designed totarget CS1 and a DDpp designed to target BCMA can be used to treatmultiple myeloma. In another embodiment the cell expressing DDpp-CARcontain a DDpp designed to target HER2 can be used to treat breastcancer or ovarian cancer.

“B cell associated diseases” as used herein include B cellimmunodeficiencies, autoimmune diseases and/or excessive/uncontrolledcell proliferation associated with B cells (including lymphomas and/orleukemias). Examples of such diseases, wherein DDpp-CAR may be used fortherapeutic approaches include but are not limited to systemic lupuserythematosus (SLE), diabetes, rheumatoid arthritis (RA), reactivearthritis, multiple sclerosis (MS), pemphigus vulgaris, celiac disease,Crohn's disease, inflammatory bowel disease, ulcerative colitis,autoimmune thyroid disease, X-linked agammaglobulinaemis, pre-B acutelymphoblastic leukemia, systemic lupus erythematosus, common variableimmunodeficiency, chronic lymphocytic leukemia, diseases associated withselective IgA deficiency and/or IgG subclass deficiency, B lineagelymphomas (Hodgkin's lymphoma and/or non-Hodgkin's lymphoma),immunodeficiency with thymoma, transient hypogammaglobulinemia and/orhyper IgM syndrome, as well as virally-mediated B cell diseases such asEBV mediated lymphoproliferative disease, and chronic infections inwhich B cells participate in the pathophysiology.

In a preferred embodiment, the DDpp-CAR is expressed in a T cell andprovides a method for treating or preventing cancer, comprising theadministration of host cells expressing DDpp-CAR to a cancer patient inwhich the cancer cell expresses a tumor antigen on its surface, andwherein the DDpp specifically binds the target antigen. Exemplary targetantigens that the DDpp and DDpp-CAR bind include, but are not limitedto, BCMA, CS1, HER2, and CD123.

The DDpp-CAR-modified T cells can also serve as a type of vaccine for exvivo immunization and/or in vivo therapy in a mammal. Preferably, themammal is a human.

The DDpp-CAR-modified T cells provided herein can be administered eitheralone, or as a pharmaceutical composition in combination with diluentsand/or with other components such as chemotherapeutics, antibodies,cytokines or cell populations. Compositions provided herein arepreferably formulated for intravenous administration that can beadministered one or more times.

“Antigen loss escape variants” as used herein refer to cells whichexhibit reduced or loss of expression of the target antigen, whichantigens are targeted by a CAR provided herein.

Various embodiments, of the disclosure will now be illustrated throughthe description of experiments conducted in accordance therewith. Theexamples that follow are provided to facilitate the practice of thedisclosed embodiments, and are not to be construed as limiting in anyway the remainder of the disclosure. In the examples, reference is madeto the appended figures.

EXAMPLES Example 1. Isolation and Characterization of DDpp that BindExemplary Targets of Interest

A DDpp library prepared as described in Intl. Appl. Publ. Nos.WO2016164305 and WO 2016164369, was screened for phage the bind BCMA,CD123, AFP, or AFP p26 through multiple rounds of selection. Thecontents of each of Intl. Appl. Publ. Nos. WO2016164305 and WO2016164369, is herein incorporated by reference in its entirety).

Individual colonies containing phagemid from BCMA panning output werepicked and phage were rescued in 96-well format using VCSM13 helperphage following standard protocols. To assay target binding by ELISA,96-well plates were coated with 1.3 microg/ml goat anti-human IgG1-Fcantibody followed by incubation with 5 nM of recombinant human target(BCMA-Fc, CD123-Fc, AFP, or AFP123) or IgG1-Fc. 50 microl of rescuedphage diluted 5× in ELISA blocking buffer was then added to each well.Binding was detected using an HRP-conjugated anti-M13 antibody and theELISA ratio for each sequence is reported as the absorbance at 450 nmfor target (i.e., BCMA-Fc, CD123-Fc, AFP, or AFP123) divided by that forIgG1-Fc averaged across all screened wells containing that clone.

Example 2. DDpp Fusion Proteins

To assess the modular nature of DDpp as a binding element, the DDppCD137-binder, bb10 (SEQ ID NO: 876), was reformatted as a fusion toeither the N or C terminus of the heavy chain of an antibody derivedfrom the sequence of the RSV-specific monoclonal antibody palivizumab(SYNAGIS@). Bi-specific antibodies, SYN-bbl0 and bbl0-SYN exhibitbinding to both CD137 and RSV (FIGS. 1A-1B; closed squares are bb10-SYN,closed circles are SYN-bb10)), demonstrating that a novel bindingactivity was imparted to the parental D domain sequence and thefunctionality of DDpp is retained as both N and C-terminal fusion. Incontrast, fusions between a target-less alpha-helical protein scaffold(SEQ ID NO: 1) and SYN (DD-SYN for N-terminal fusion, open circles;SYN-DD for C-terminal fusion, open squares) showed binding only to RSV,but no binding to CD137.

Binding of DDpp, bb10 to CD137 directly bound to plastic wasdemonstrated using ELISA (FIGS. 1A-1B). Binding of DDpp bb10 to CD137 aspart of a cell membrane was also observed in situ, using FACS (data notshown)

Example 3. DDpp-CARs Expressed in Human T Cells Produce Cytokines onTarget Binding

The ability of target: DDpp-CAR-expressing T cell engagement to resultinduce cytokine secretion was assessed by 293T cells were transientlytransfecting 293T cells with 3rd generation lentiviral packaging vectors(pRSV-REV, pMDLg/pRRE, and pMD2.G) with pELNS vectors encoding DDpp-CARsusing LIPOFECTAMINE@ 3000. Six hours post-transfection the media waschanged, then lentivirus containing media was collected at 30 and 54hours post-transfection, pooled, then centrifuged to remove cell debris.Lentivirus was then aliquoted and stored at −80° C. until used for viraltransduction. Transduction of human T cells with CAR lentivirus wasperformed using total human PBMCs, activated with aCD3/CD28 T cellactivation beads in culture media supplemented with 40 U/ml of IL2.After 24 hours, 2×10⁶ PBMCs were plated per well in a 6-well tissueculture plate with 1 ml of culture media and 3 ml of lentiviruscontaining media supplemented with 40U/ml of IL2 and protamine sulfate.Plates were then centrifuged for 2 hours at 1000×g at 32° C. and thenincubated overnight 37° C. The following day the lentivirus transductionprocedure was repeated with fresh culture media andlentivirus-containing media. 72 hours after the initial cell activation,T cell activation beads were removed, then T cells were cultured forexpansion at ˜0.25−0.5×10⁶ T cells/ml in fresh media supplemented with100U/ml of IL2. Every 2-3 days T cells were supplemented with additionalT cell media and IL2, until they were used for the cytokine assays(described below) 7-10 days after the initial activation.

Cytokine production in response to target antigen expression (CD123) wasassessed by culturing 25,000 transduced T cells (7 days post-activation)with 25,000 non-target (K562, CD123-) or target (BDCM, CD123+) tumorcells per well in 96-well plates. After 24 hours culture supernatantswere collected and cytokine production was assessed by ELISA. Culturesupernatants were diluted 1:5 prior to ELISA. Similarly, cytokineproduction in response to PDL1 target antigen expression was assessed byculturing 25,000 transduced T cells (7-days post activation) with 25,000non-target (K562, PDL1) or target (SUDHL1, PDL1*) tumor cells per wellin 96-well plates. After 24 hours culture supernatants were collectedand cytokine production was assessed by ELISA. Culture supernatants werediluted 1:5 prior to ELISA.

FIG. 2A and FIG. 2B demonstrate that T cells expressing CD123 bindingDDpp-CARs produce interferon gamma (IFNγ) following stimulation withCD123⁺ BDCM cells, but not the CD123 cell line K562. FIG. 2C and FIG. 2Ddemonstrates that T cells expressing CD123 binding DDpp-CARs produceinterleukin 2 (IL2) following stimulation with CD123⁺ BDCM cells, butnot the CD123⁻ cell line K562. Similarly, FIGS. 2E and 2F demonstratethat T cells expressing PDL1 binding DDpp-CARs produce interferon gamma(IFNγ) and IL2 respectively following stimulation with PDL1⁺ SUDHL1cells but not the PDL1 cell line K562.

Example 4. DDpp-CAR Transduced T Cells do not Display PhenotypesAssociated with T Cell Exhaustion

To assess potential antigen-independent exhaustion in T cells expressingDDpp-CARs, transduced T cells (day 10 post-activation) were stained withantibodies against CD3 and markers of T cell exhaustion (LAG3, PD1, andTIM3). FIG. 3A summarizes data from individual experiments acrossseveral T cell donors. The data demonstrate that expression of theexhaustion markers was not enhanced in CD123-binding DDpp-CAR T cellsover that observed with the anti-CD123 CAR comprising the scFv (32176).FIG. 3B shows representative flow cytometry data of LAG3, PD1, and TIM3expression in T cells transduced with either a scFv-containing CAR (toprow) or a DDpp-CAR (in this particular experiment CD123 targeting cg06)10 days after the initial activation of the T cells. The similarity ofthese data again demonstrate that DDpp-CAR T cells do not upregulateexpression of exhaustion markers, which lends further support to theirefficacy in cancer immunotherapy.

Example 5. DDpp-CAR Expressing T Cells Exhibit Target-SpecificDegranulation and Tumor Cytotoxicity

To assess degranulation of T cells expressing DDpp-CARs, 1×0l transducedT cells (day 9 post-activation) were cultured in T cell media for 4hours in the presence of monensin and PE-conjugated CD107a/LAMP1. Tcells were cultured alone (FIG. 4A) or in the presence of 2×10⁵non-target tumor cells (K562, which are CD123-, FIG. 4B ortarget-expressing tumor cells (BDCM, CD123+, FIG. 4C), then washed andstained for CD3 expression. T cell degranulation was then assessed byflow cytometry, first gating on the CD3+SSC-low cells (non-tumor), thenthe CD3+CD107a+ cells. Symbols represent samples from individualexperiments using multiple donors.

The production of CD107a (a marker of degranulation of the DDpp-CAR Tcells) was equivalent to negative controls when CD123-targeting DDpp-CART cells were cultured alone. Limited CD107a expression when DDpp-CAR Tcells were co-cultured with CD123 negative K562 tumor cells andsignificant CD107a expression was observed when CD123-targeting DDpp-CART cells were co-cultured with CD123 positive BDCM cells (data notshown). These data indicate that the T cells are activated, undergoingsignaling, undergoing degranulation, and will result in tumoreradication. These data also provide further support for thetarget-dependent activation of DDpp-CAR expressing T cells.

The cytolytic activity of DDpp-CAR T cells was assessed using T cellsprepared from two independent donors. Donor #1 (FIG. 5A-5B) DDpp-CAR Tcells effectively kill the CD123 expressing tumor, BDCM, but show verylittle cytolytic activity on the CD123 negative tumor, K562. Similarresults were observed with Donor #2 (FIGS. 5C and 5D).

Example 6. Bi-Specific DDpp

As discussed above, DDpp can be monovalent or multivalent and/ormultispecific. To evaluate the ability of multispecific DDppCAR T cellsto elicit an immune response, bi-specific DDpp-CARs were expressed onJurkat cells and intracellular signaling in response to tumor cellsexpressing one or both targets was measured. Two bi-specific DDppCARswere constructed that differed in the fusion order of the bindingdomains. CG06-pb04 has the pb04 domain fused to the CD8a transmembraneregion while the pb04-cg06 has the cgo6 domain fused to the CD8atransmembrane region. Both constructs utilized a GS linker between thetarget-binding domains.

FIG. 6A demonstrates that DDpp-CARs comprising cg06 only, pb04 only(FIG. 6B),cg06-pb04, (FIG. 5C), and pb04-cg06 (FIG. 5D) can betransduced and expressed in the Jurkat NFAT reporter cell line asassessed by anti-FLAG mAb binding to the CARs. The ability of themono-specific and bi-specific CARs to activate the NFAT pathway wasassessed by co-culturing the various CARs with tumor cells withdifferent level of CD123 and/or PDL1 expression. Cells were co-culturedwith target cells for 6 hours. NFAT mediated signaling was measuredthrough the addition to the cells of luciferase assay reagent (Promega)and quantitation of relative luminescence units (RLU) as a measure ofinduced intracellular signaling.

FIG. 6E depicts the results of this experiment. The leftmost group ofbars and the histogram show the relative kill effect of the cg06 DDppagainst various cell types. Signaling response after co-culture withhighly CD123+ BDCM was the greatest with this DDpp-CAR. The next groupto the right depicts data showing intracellular signaling afterco-culture of the pb04 DDpp against the same cell types. Signaling washighest in BDCM, followed by SUHDL1, and H460 (these are the highestexpressing cell lines for CD123 and PDL1 (data not shown)). The nextgroup to the right depicts data showing intracellular signaling of abi-specific cg06-pb04 DDpp (cg06 more distal to the T cell membrane ascompared to pb04). Finally, the rightmost group shows intracellularsignaling from a second bi-specific DBPpp (pb04-cg06 DDpp, where pb04 ismore distal to the T cell membrane as compared to cg06). These twogroups indicate that bi-specific DDpp-CARs do function to promoteintracellular signaling. In accordance with embodiments, bi-specificDDpp-CARs show enhanced activity (the magnitude of intracellularsignaling in the pb04-cg06 group with BDCM cells is greater than can beaccounted for by just the pb04 DDpp alone). Thus in some embodiments,DDpp-CARs comprising two DDpps can cooperate to enhance T cell function.In some embodiments, there is a synergy between the various DDpp used ina bispecific (or other multimeric) DDpp-CAR.

Example 7. Use of Dual Binding Domain Adapters to Enhance CAR Signalling

50,000 reporter cells previously transduced with an AFP (p26domain)-binding CAR (af03) (SEQ ID NO: 961) were cultured for 5 hours inthe presence of the CD123-specific Cg06-adaptor (Cg06-p26, SEQ ID NO:953) or the Cg06-dual adaptor protein (Cg06-p26-Cg06, SEQ ID NO: 956) inthe presence of 50,000 CD123⁺ MOLM13 or CD123-deficient MOLM13 cells,then assessed for luciferase activity. CD123 deficient cells weregenerated using CRISPR/Cas9 genetic engineering technology (FIG. 7A).Similarly, 50,000 reporter cells previously transduced with an AFP (p26domain)-binding CAR (af03) (SEQ ID NO: 961) were cultured for 5 hours inthe presence of the BCMA-specific Bc40-adaptor (Bc40-p26, SEQ ID NO:954) or the Bc40-dual adaptor protein (Bc40-p26-Bc40, SEQ ID NO: 957) inthe presence or absence of 50,000 BCMA* U266 cells, then assessed forluciferase activity (FIG. 7B).

FIGS. 7A and 7B show that dual-binding (bi-valent) domain adaptorproteins drive enhanced signaling by CAR-expressing Jurkat cells oversingle-binding domain adaptor proteins.

Example 8. DDpp-Mediated Tumor Immunotherapy In Vivo

To assess the in vivo anti-tumor activity of a DDpp CAR, T cells weretransduced with bc40 DDpp CAR (BCMA targeting CAR). Bc40 is SEQ ID NO:164. Transduced cells (5×10E6) were administered intravenously to NSGmice 34 days after mice received 10E7 cells of the BCMA expressing,luciferase/gfp labeled U226 tumor cells. As shown in FIG. 8, four micereceived the U226 tumor on Day 0 which progressive grew through Day 32.On Day 34, mouse #1, #2, and #4 received bc40-DDpp CAR T cells. Mouse #3received no T cells. On Day 45, the U226 tumor was cleared in micereceiving CAR T cells while the mouse that did not receive T cells diedof tumor burden.

All publications, patents, patent applications, internet sites, andaccession numbers/database sequences (including both polynucleotide andpolypeptide sequences) cited are herein incorporated by reference intheir entirety for all purposes to the same extent as if each individualpublication, patent, patent application, internet site, or accessionnumber/database sequence were specifically and individually indicated tobe so incorporated by reference.

It is contemplated that various combinations or subcombinations of thespecific features and aspects disclosed above may be made and still fallwithin the embodiments, encompassed by the disclosure. Further, thedisclosure of any particular feature, aspect, method, property,characteristic, quality, attribute, element, or the like in connectionwith an embodiment can be used in all other embodiments, set forthherein. Accordingly, it should be understood that various features andaspects of the disclosed embodiments, can be combined with orsubstituted for one another in order to form varying modes of thedisclosed embodiments. Thus, it is intended that the scope of theembodiments, encompassed by the present disclosure should not be limitedby the particular disclosed embodiments, described herein. Moreover,while the encompassed embodiments, are susceptible to variousmodifications, and alternative forms, specific examples thereof havebeen shown in the drawings and are herein described in detail. It shouldbe understood, however, that the scope of the disclosure is not to belimited to the particular forms or methods disclosed, but to thecontrary, the disclosure is to cover all modifications, equivalents, andalternatives falling within the spirit and scope of the variousembodiments, described and the appended claims. Any methods disclosedherein need not be performed in the order recited. The methods disclosedherein include certain actions taken by a practitioner; however, theycan also include any third-party instruction of those actions, eitherexpressly or by implication. For example, actions such as “administeringa T cell comprising a DDpp-CAR” include “instructing the administrationof a T cell comprising a DDpp-CAR.” In addition, where features oraspects of the disclosure are described in terms of Markush groups,those skilled in the art will recognize that the disclosure is alsothereby described in terms of any individual member or subgroup ofmembers of the Markush group.

The ranges disclosed herein also encompass any and all overlap,sub-ranges, and combinations thereof. Language such as “up to,” “atleast,” “greater than,” “less than,” “between,” and the like includesthe number recited. Numbers preceded by a term such as “about” or“approximately” include the recited numbers. For example, “about 10nanometers” includes “10 nanometers.”

TABLE 2 Additional sequence disclosure: SEQ ID: Target Sequence   1D DomainMGSWAEFKQRLAAIKTRLQALGGSEAELAAFEKEIAAFESELQAYKGKGNPEVEALRKEAAAIRDEL(target- QAYRHN less)   2 MHC Epitope LAAIKTRLQ   3 CD19LEKCFQTENPLECQDKGEEELQKYIQESQALAKRSCGLFQKLGEYYLQNAFLVAYTKKAPQLTSSELMAITRKMAATAATCCQLSEDKLLACGEGAADIIIGHLCIRHEMTPVNPGVGQCCTSSYANRRPCFSSLVVDETYVPPAFSDDKFIFHKDLCQAQGVALQTMKQEFLINLVKQKPQITEEQLEAVIADFSGLLEKCCQGQEQEVCFAEEGQKLISKTRAALGV   4 GlySer GGGGTGGGGS   5 GlySer GGGGDGGGGS  6 a3D(Q19E)MGSWAEFKQRLAAIKTRLEALGGSEAELAAFEKEIAAFESELQAYKGKGNPEVEALRKEAAAIRDELTargetless QAYRHN   7 BCMA ECDMLQMAGQCSQNEYFDSLLHACIPCQLRCSSNTPPLTCQRYCNASVTNSVKGTNA   8 CD123 ECDTKEDPNPPITNLRMKAKAQQLTWDLNRNVTDIECVKDADYSMPAVNNSYCQFGAISLCEVTNYTVRVANPPFSTWILFPENSGKPWAGAENLTCWIHDVDFLSCSWAVGPGAPADVQYDLYLNVANRRQQYECLHYKTDAQGTRIGCRFDDISRLSSGSQSSHILVRGRSAAFGIPCTDKFVVFSQIEILTPPNMTAKCNKTHSFMHWKMRSHFNRKFRYELQIQKRMQPVITEQVRDRTSFQLLNPGTYTVQIRARERVYEFLSAWSTPQRFECDQEEGANTRAWR   9 AFPRTLHRNEYGIASILDSYQCTAEISLADLATIFFAQFVQEATYKEVSKMVKDALTAIEKPTGDEQSSGCLENQLPAFLEELCHEKEILEKYGHSDCCSQSEEGRHNCFLAHKKPTPASIPLFQVPEPVTSCEAYEEDRETFMNKFIYEIARRHPFLYAPTILLWAARYDKIIPSCCKAENAVECFQTKAATVTKELRESSLLNQHACAVMKNFGTRTFQAITVTKLSQKFTKVNFTEIQKLVLDVAHVHEHCCRGDVLDCLQDGEKIMSYICSQQDTLSNKITECCKLTTLERGQCIIHAENDEKPEGLSPNLNRFLGDRDFNQFSSGEKNIFLASFVHEYSRRHPQLAVSVILRVAKGYQELLEKCFQTENPLECQDKGEEELQKYIQESQALAKRSCGLFQKLGEYYLQNAFLVAYTKKAPQLTSSELMAITRKMAATAATCCQLSEDKLLACGEGAADIIIGHLCIRHEMTPVNPGVGQCCTSSYANRRPCFSSLVVDETYVPPAFSDDKFIFHKDLCQAQGVALQTMKQEFLINLVKQKPQITEEQLEAVIADFSGLLEKCCQGQEQEVCFAEEGQKLISKTRAALGV  10 AFP p26LEKCFQTENPLECQDKGEEELQKYIQESQALAKRSCGLFQKLGEYYLQNAFLVAYTKKAPQLTSSELMAITRKMAATAATCCQLSEDKLLACGEGAADIIIGHLCIRHEMTPVNPGVGQCCTSSYANRRPCFSSLVVDETYVPPAFSDDKFIFHKDLCQAQGVALQTMKQEFLINLVKQKPQITEEQLEAVIADFSGLLEKCCQGQEQEVCFAEECQKLISKTRAALCV 968 P26Q217PLEKCFQTENPLECQDKGEEELQKYIQESQALAKRSCGLFQKLGEYYLQNAFLVAYTKKAPQLTSSELMAITRKMAATAATCCQLSEDKLLACGEGAADIIIGHLCIRHEMTPVNPGVGQCCTSSYANRRPCFSSLVVDETYVPPAFSDDKFIFHKDLCQAQGVALQTMKQEFLINLVKQKPQITEEQLEAVIADFSGLLEKCCQGQEQEVCFAEEGPKLISKTRAALGV 969 P26(Q26-QESQALAKRSCGLFQKLGEYYLQNAFLVAYTKKAPQLTSSELMAITRKMAATAATCCQLS V229)EDKLLACGEGAADIIIGHLCIRHEMTPVNPGVGQCCTSSYANRRPCFSSLVVDETYVPPAFSDDKFIFHKDLCQAQGVALQTMKQEFLINLVKQKPQITEEQLEAVIADFSGLLEKCCQGQEQEVCFAEEGQKLISKTRAALGV 970 P26(Q26-QESQALAKRSCGLFQKLGEYYLQNAFLVAYTKKAPQLTSSELMAITRKMAATAATCCQLS V229)EDKLLACGEGAADIIIGHLCIRHEMTPVNPGVGQCCTSSYANRRPCFSSLVVDETYVPPA Q217PFSDDKFIFHKDLCQAQGVALQTMKQEFLINLVKQKPQITEEQLEAVIADFSGLLEKCCQGQEQEVCFAEEGPKLISKTRAALGV 971 p26(K23-KYIQESQALAKRSCGLFQKLGEYYLQNAFLVAYTKKAPQLTSSELMAITRKMAATAATCC V229)QLSEDKLLACGEGAADIIIGHLCIRHEMTPVNPGVGQCCTSSYANRRPCFSSLVVDETYVPPAFSDDKFIFHKDLCQAQGVALQTMKQEFLINLVKQKPQITEEQLEAVIADFSGLLEKCCQGQEQEVCFAEEGQKLISKTRAALGV 972 p26(K23-KYIQESQALAKRSCGLFQKLGEYYLQNAFLVAYTKKAPQLTSSELMAITRKMAATAATCC V229)QLSEDKLLACGEGAADIIIGHLCIRHEMTPVNPGVGQCCTSSYANRRPCFSSLVVDETYV Q217PPPAFSDDKFIFHKDLCQAQGVALQTMKQEFLINLVKQKPQITEEQLEAVIADFSGLLEKCCQGQEQEVCFAEEGPKLISKTRAALGV 973 p26(G17-GEEELQKYIQESQALAKRSCGLFQKLGEYYLQNAFLVAYTKKAPQLTSSELMAITRKMAA V229)TAATCCQLSEDKLLACGEGAADIIIGHLCIRHEMTPVNPGVGQCCTSSYANRRPCFSSLVVDETYVPPAFSDDKFIFHKDLCQAQGVALQTMKQEFLINLVKQKPQITEEQLEAVIADFSGLLEKCCQGQEQEVCFAEEGQKLISKTRAALGV 974 p26(G17-GEEELQKYIQESQALAKRSCGLFQKLGEYYLQNAFLVAYTKKAPQLTSSELMAITRKMAA V229)TAATCCQLSEDKLLACGEGAADIIIGHLCIRHEMTPVNPGVGQCCTSSYANRRPCFSSLV Q217PVDETYVPPAFSDDKFIFHKDLCQAQGVALQTMKQEFLINLVKQKPQITEEQLEAVIADFSGLLEKCCQGQEQEVCFAEEGPKLISKTRAALGV 963 CD22DSSKWVFEHPETLYAWEGACVWIPCTYRALDGDLESFILFHNPEYNKNTSKFDGTRLYESTKDGKVPmatureSEQKRVQFLGDKNKNCTLSIHPVHLNDSGQLGLRMESKTEKWMERIHLNVSERPFPPHIQLPPEIQE ECDSQEVTLTCLLNFSCYGYPIQLQWLLEGVPMRQAAVTSTSLTIKSVFTRSELKFSPQWSHHGKIVTCQLQDADGKFLSNDTVQLNVKHTPKLEIKVTPSDAIVREGDSVTMTCEVSSSNPEYTTVSWLKDGTSLKKQNTFTLNLREVTKDQSGKYCCQVSNDVGPGRSEEVFLQVQYAPEPSTVQILHSPAVEGSQVEFLCMSLANPLPTNYTWYHNGKEMQGRTEEKVHIPKILPWHAGTYSCVAENILGTGQRGPGAELDVQYPPKKVTTVIQNPMPIREGDTVTLSCNYNSSNPSVTRYEWKPHGAWEEPSLGVLKIQNVGWDNTTIACAACNSWCSWASPVALNVQYAPRDVRVRKIKPLSEIHSGNSVSLQCDFSSSHPKEVQFFWEKNGRLLGKESQLNFDSISPEDAGSYSCWVNNSIGQTASKAWTLEVLYAPRRLRVSMSPGDQVMEGKSATLTCESDANPPVSHYTWFDWNNQSLPYHSQKLRLEPVKVQHSGAYWCQGTNSVGKGRSPLSTLTVYYSPETIGRR 965CS1 SGPVKELVGSVGGAVTFPLKSKVKQVDSIVWTFNTTPLVTIQPEGGTIIVTQNRNRERVDFPDGGYSmatureLKLSKLKKNDSGIYYVGIYSSSLQQPSTQEYVLHVYEHLSKPKVTMGLQSNKNGTCVTNLTCCMEHG ECDEEDVIYTWKALGQAANESHNGSILPISWRWGESDMTFICVARNPVSRNFSSPILARKLCEGAADDPD SSM967 HER2TQVCTGTDMKLRLPASPETHLDMLRHLYQGCQVVQGNLELTYLPTNASLSFLQDIQEVQGYVLIAHNmatureQVRQVPLQRLRIVRGTQLFEDNYALAVLDNGDPLNNTTPVTGASPGGLRELQLRSLTEILKGGVLIQ ECDRNPQLCYQDTILWKDIFHKNNQLALTLIDTNRSRACHPCSPMCKGSRCWGESSEDCQSLTRTVCAGGCARCKGPLPTDCCHEQCAAGCTGPKHSDCLACLHFNHSGICELHCPALVTYNTDTFESMPNPEGRYTFGASCVTACPYNYLSTDVGSCTLVCPLHNQEVTAEDGTQRCEKCSKPCARVCYGLGMEHLREVRAVTSANIQEFAGCKKIFGSLAFLPESFDGDPASNTAPLQPEQLQVFETLEEITGYLYISAWPDSLPDLSVFQNLQVIRGRILHNGAYSLTLQGLGISWLGLRSLRELGSGLALIHHNTHLCFVHTVPWDQLFRNPHQALLHTANRPEDECVGEGLACHQLCARGHCWGPGPTQCVNCSQFLRGQECVEECRVLQGLPREYVNARHCLPCHPECQPQNGSVTCFGPEADQCVACARYKDPPFCVARCPSGVKPDLSYMPIWKFPDEEGACQPCPINCTHSCVDLDDKGCPAEQRASPLT

TABLE 3 Exemplary Adapters SEQ ID NO: Adapter Design Adapter Sequence951

DEMGSWDEFGRRLYAIEWRLYALGGSEAELAAFEKEIAAFESELQAYKGKGNPEVEKLREIAAVIRSNLQAYRHNGGGGSGGGGSGGGGSGMLQMAGQCSQNEYFDSLLHACIPCQLRCSSNTPPLTCQRYCNASVTNSVKGTNAGGGGSGGGGSGGGGSHHHHHHHHHH 952

DEGGGGSMGSWAEFKQRLAAIKTRLQALGGSEAELAAFEKEIAAFESELQAYKGKGNPEVEALRKEAAAIRDELQAYRHNGGGGSGGGGSGGGGSGMLQMAGQCSQNEYFDSLLHACIPCQLRCSSNTPPLTCQRYCNASVTNSVKGTNAGGGGSGGGGSGGGGSHHHHHHHHHH 953

DEHHHHHHHHHHKLENLYFQGGGGGSMGSWDEFGRRLYAIEWRLYALGGSEAELAAFEKEIAAFESELQAYKGKGNPEVEKLREIAAVIRSNLQAYRHNGGGGSGGGGSGGGGSLEKCFQTENPLECQDKGEEELQKYIQESQALAKRSCGLFQKLGEYYLQNAFLVAYTKKAPQLTSSELMAITRKMAATAATCCQLSEDKLLACGEGAADIIIGHLCIRHEMTPVNPGVGQCCTSSYANRRPCFSSLVVDETYVPPAFSDDKFIFHKDLCQAQGVALQTMKQEFLINLVKQKPQITEEQLEAVIADFSGLLEKCCQGQEQEVCFAEEGQKLISKTRAALGV 954

DEHHHHHHHHHHKLENLYFQGGGGGSMGSWSEFWVRLGAIRERLDALGGSEAELAAFEKEIAAFESELQAYKGKGNPEVEKLRYTAATIRRFLQAYRHNGGGGSGGGGSGGGGSLEKCFQTENPLECQDKGEEELQKYIQESQALAKRSCGLFQKLGEYYLQNAFLVAYTKKAPQLTSSELMAITRKMAATAATCCQLSEDKLLACGEGAADIIIGHLCIRHEMTPVNPGVGQCCTSSYANRRPCFSSLVVDETYVPPAFSDDKFIFHKDLCQAQGVALQTMKQEFLINLVKQKPQITEEQLEAVIADFSGLLEKCCQGQEQEVCFAEEGQKLISKTRAALGV 955

DEHHHHHHHHHHKLENLYFQGGGGGSMGSWAEFKQRLAAIKTRLEALGGSEAELAAFEKEIAAFESELQAYKGKGNPEVEALRKEAAAIRDELQAYRHNGGGGSGGGGSGGGGSLEKCFQTENPLECQDKGEEELQKYIQESQALAKRSCGLFQKLGEYYLQNAFLVAYTKKAPQLTSSELMAITRKMAATAATCCQLSEDKLLACGEGAADIIIGHLCIRHEMTPVNPGVGQCCTSSYANRRPCFSSLVVDETYVPPAFSDDKFIFHKDLCQAQGVALQTMKQEFLINLVKQKPQITEEQLEAVIADFSGLLEKCCQGQEQEVCFAEEGQKLISKTRAALGV 956

DEGGGGSMGSWDEFGRRLYAIEWQLYALGGTEAELAAFEKEIAAFESELQAYKGKGNPEVEKLREIAAVIRENLQAYRHNGGGGSGGGGSGGGGSGLEKCFQTENPLECQDKGEEELQKYIQESQALAKRSCGLFQKLGEYYLQNAFLVAYTKKAPQLTSSELMAITRKMAATAATCCQLSEDKLLACGEGAADIIIGHLCIRHEMTPVNPGVGQCCTSSYANRRPCFSSLVVDETYVPPAFSDDKFIFHKDLCQAQGVALQTMKQEFLINLVKQKPQITEEQLEAVIADFSGLLEKCCQGQEQEVCFAEEGQKLISKTRAALGVGGGGSGGGGSGGGGSMGSWDEFGRRLYAIEWQLYALGGTEAELAAFEKEIAAFESELQAYKGKGNPEVEKLREIAAVIRENLQAYRHNGGGGSGGGGSGGGGSHHHHHHHHHH 957

DEGGGGSMGSWSEFWVRLGAIRERLDALGGSEAELAAFEKEIAAFESELQAYKGKGNPEVEKLRYTAATIRRFLQAYRHNGGGGSGGGGSGGGGSGLEKCFQTENPLECQDKGEEELQKYIQESQALAKRSCGLFQKLGEYYLQNAFLVAYTKKAPQLTSSELMAITRKMAATAATCCQLSEDKLLACGEGAADIIIGHLCIRHEMTPVNPGVGQCCTSSYANRRPCFSSLVVDETYVPPAFSDDKFIFHKDLCQAQGVALQTMKQEFLINLVKQKPQITEEQLEAVIADFSGLLEKCCQGQEQEVCFAEEGQKLISKTRAALGVGGGGSGGGGSGGGGSMGSWSEFWVRLGAIRERLDALGGSEAELAAFEKEIAAFESELQAYKGKGNPEVEKLRYTAATIRRFLQAYRHNGGGGSGGGGSGGGGSHHHHHHHHHH

TABLE 4 Exemplary ADBD CAR Sequences SEQ ID NO: CAR Design CAR Sequence958 CTsp-Flag-GSlinker-α3D(Q19E)-MAFLWLLSCWALLGTTFGDYKDDDDKGGGGSGGGGSMGSWAEF GSlinker-CD8H-TM-41BB-CD3ζKQRLAAIKTRLEALGGSEAELAAFEKEIAAFESELQAYKGKGNPEVEALRKEAAAIRDELQAYRHNGQAGSGTTTPAPRPPTPAPTIASQPLSLRPEACRPAAGGAVHTRGLDFACDIYIWAPLAGTCGVLLLSLVITLYCKRGRKKLLYIFKQPFMRPVQTTQEEDGCSCRFPEEEEGGCELRVKFSRSADAPAYKQGQNQLYNELNLGRREEYDVLDKRRGRDPEMGGKPRRKNPQEGLYNELQKDKMAEAYSEIGMKGERRRGKGHDGLYQGLSTATKDTYDALHMQALPPR 959 CTsp-Flag-GSlinker-cg06-MAFLWLLSCWALLGTTFGDYKDDDDKGGGGSGGGGSMGSWDEF GSlinker-CD8H-TM-41BB-CD3ζGRRLYAIEWRLYALGGSEAELAAFEKEIAAFESELQAYKGKGNPEVEKLREIAAVIRSNLQAYRHNGGGGSGGGGSGTTTPAPRPPTPAPTIASQPLSLRPEACRPAAGGAVHTRGLDFACDIYIWAPLAGTCGVLLLSLVITLYCKRGRKKLLYIFKQPFMRPVQTTQEEDGCSCRFPEEEEGGCELRVKFSRSADAPAYKQGQNQLYNELNLGRREEYDVLDKRRGRDPEMGGKPRRKNPQEGLYNELQKDKMAEAYSEIGMKGERRRGKGHDGLYQGLSTATKDTYDALHMQALPPR 960 CTsp-Flag-GSlinker-bc40-MAFLWLLSCWALLGTTFGDYKDDDDKGGGGSGGGGSMGSWSEF GSlinker-CD8H-TM-41BB-CD3ζWVRLGAIRERLDALGGSEAELAAFEKEIAAFESELQAYKGKGNPEVEKLRYTAATIRRFLQAYRHNGGGGSGGGGSGTTTPAPRPPTPAPTIASQPLSLRPEACRPAAGGAVHTRGLDFACDIYIWAPLAGTCGVLLLSLVITLYCKRGRKKLLYIFKQPFMRPVQTTQEEDGCSCRFPEEEEGGCELRVKFSRSADAPAYKQGQNQLYNELNLGRREEYDVLDKRRGRDPEMGGKPRRKNPQEGLYNELQKDKMAEAYSEIGMKGERRRGKGHDGLYQGLSTATKDTYDALHMQALPPR 961 CTsp-Flag-GSlinker-af03-MAFLWLLSCWALLGTTFGDYKDDDDKGGGGSGGGGSMGSWFEF GSlinker-CD8H-TM-41BB-CD3ζYDRLNAIDARLWALGGSEAELAAFEKEIAAFESELQAYKGKGNPEVENLRVHAAAIREWLQAYRHNGGGGSGGGGSGTTTPAPRPPTPAPTIASMGSWAEFKQRLAAIKTRLEALGGSEAELAAFEKEIAAFESELQAYKGKGNPEVEALRKEAAAIRDELQAYRHNQPLSLRPEACRPAAGGAVHTRGLDFACDIYIWAPLAGTCGVLLLSLVITLYCKRGRKKLLYIFKQPFMRPVQTTQEEDGCSCRFPEEEEGGCELRVKFSRSADAPAYKQGQNQLYNELNLGRREEYDVLDKRRGRDPEMGGKPRRKNPQEGLYNELQKDKMAEAYSEIGMKGERRRGKGHDGLYQGLSTATKDTYDALHMQALPPR 962 CTsp-Flag-GSlinker-af05-MAFLWLLSCWALLGTTFGDYKDDDDKGGGGSGGGGSMGSWLEF GSlinker-CD8H-TM-41BB-CD3ζYHRLNAIDSRLWALGGSEAELAAFEKEIAAFESELQAYKGKGNPEVESLRDHAAHIREWLQAYRHNGGGGSGGGGSGTTTPAPRPPTPAPTIASQPLSLRPEACRPAAGGAVHTRGLDFACDIYIWAPLAGTCGVLLLSLVITLYCKRGRKKLLYIFKQPFMRPVQTTQEEDGCSCRFPEEEEGGCELRVKFSRSADAPAYKQGQNQLYNELNLGRREEYDVLDKRRGRDPEMGGKPRRKNPQEGLYNELQKDKMAEAYSEIGMKGERRRGKGHDGLYQGLSTATKDTYDALHMQALPPR

1-44. (canceled)
 45. A protein comprising a D Domain (DD) target bindingdomain wherein the DD specifically binds CD123 and comprises an aminoacid sequence having at least 90% sequence identity to SEQ ID NO: 344.46. The protein of claim 45, wherein the DD comprises the amino acidsequence of SEQ ID NO: 344 comprising 0, 1, 2, 3, 4 or 5 substitutions.47. The protein of claim 45, wherein the DD is fused to (a) antibody orantigen binding fragment thereof; (b) a transmembrane domain; (c) amembrane associating domain; (d) a serum protein or fragment thereof, or(e) an Fc domain.
 48. A protein according to claim 45, which isconjugated to a therapeutic or cytotoxic agent.
 49. A chimeric antigenreceptor (CAR) which comprises a target binding domain comprising theprotein of claim
 45. 50. The CAR of claim 49, which further atransmembrane domain and an intracellular signaling domain.
 51. The CARof claim 50, wherein the transmembrane domain comprises a CD8, 41BB orCD28 transmembrane domain.
 52. The CAR of claim 50, wherein theintracellular signaling domain is selected from the group consisting ofa domain of a human T cell receptor alpha, beta, or zeta chain; a human41BB domain; a human CD28 domain, and any combination thereof.
 53. TheCAR of claim 50, wherein the intracellular signaling domain comprisesthe intracellular domain of a costimulatory molecule selected from thegroup consisting of CD27, CD28, 41BB, OX40, CD30, CD40, PD1, lymphocytefunction-associated antigen-1 (LFA-1), CD2, CD7, LIGHT, NKG2C, NKG2D,B7-H3, a ligand that specifically binds with CD83, and any combinationthereof.
 54. An isolated nucleic acid encoding the protein of claim 45,or a chimeric antigen receptor (CAR) comprising a target binding domaincomprising the protein of claim
 45. 55. A vector comprising the nucleicacid of claim
 54. 56. A host cell comprising the nucleic acid of claim54.
 57. A cell engineered to express the CAR of claim
 49. 58. A cellaccording of claim 13, wherein the cell is a T cell or a natural killer(NK) cell.
 59. A pharmaceutical composition comprising the protein ofclaim
 45. 60. A method of treating a subject suffering from a B cellmediated disease or disorder, the method comprising administering to thesubject an effective amount of the protein according to claim
 45. 61.The method of claim 60, wherein the B cell mediated disease or disorderis a B cell malignancy.
 62. The method of claim 61, wherein the B cellmalignancy is acute myeloid leukemia.
 63. A method of treating a subjectsuffering from a B cell mediated disease or disorder, the methodcomprising administering to the subject an effective amount of the cellaccording to claim
 57. 64. The method of claim 63, wherein the B cellmediated disease or disorder is acute myeloid leukemia.